diff --git a/PySimpleGUI.py b/PySimpleGUI.py
index 0ec8ed2a..ff6919ab 100644
--- a/PySimpleGUI.py
+++ b/PySimpleGUI.py
@@ -1,6 +1,6 @@
 #!/usr/bin/python3
 
-version = __version__ = "4.11.0.5 Unreleased - ability to set disabled colors for buttons (tk + ttk), popup no more closebutton use, browse cancel fix for linux, highlight thickness=0"
+version = __version__ = "4.12.0  Released 14-Dec-2019"
 
 port = 'PySimpleGUI'
 
@@ -11188,7 +11188,7 @@ def Popup(*args, title=None, button_color=None, background_color=None, text_colo
         button, values = window.Read(timeout=0)
     else:
         button, values = window.Read()
-        window.close()
+        window.close(); del window
 
     return button
 
@@ -11263,7 +11263,7 @@ def PopupScrolled(*args, title=None, button_color=None, background_color=None, t
         button, values = window.Read(timeout=0)
     else:
         button, values = window.Read()
-        window.close()
+        window.close(); del window
     return button
 
 
@@ -11708,7 +11708,7 @@ def PopupGetFolder(message, title=None, default_path='', no_window=False, size=(
                     location=location)
 
     button, values = window.Read()
-    window.Close()
+    window.close(); del window
     if button != 'Ok':
         return None
     else:
@@ -11806,7 +11806,7 @@ def PopupGetFile(message, title=None, default_path='', default_extension='', sav
                     no_titlebar=no_titlebar, grab_anywhere=grab_anywhere, keep_on_top=keep_on_top, location=location)
 
     button, values = window.Read()
-    window.Close()
+    window.close(); del window
     if button != 'Ok':
         return None
     else:
@@ -11849,7 +11849,7 @@ def PopupGetText(message, title=None, default_text='', password_char='', size=(N
                     location=location)
 
     button, values = window.Read()
-    window.Close()
+    window.close(); del window
     if button != 'Ok':
         return None
     else:
@@ -11905,7 +11905,7 @@ def PopupAnimated(image_source, message=None, background_color=None, text_color=
         window = Window.animated_popup_dict[image_source]
         window.Element('_IMAGE_').UpdateAnimation(image_source, time_between_frames=time_between_frames)
 
-    window.read(timeout=10)  # call refresh instead of Read to save significant CPU time
+    window.refresh() # call refresh instead of Read to save significant CPU time
 
 
 #####################################################################################################
@@ -12206,21 +12206,21 @@ class _Debugger():
                 cur_col += 1
         ScrolledTextBox(out_text, non_blocking=True)
 
-    #####                                        #     #
+     #####                                        #     #
     #     # #    #  ####   ####   ####  ######    #  #  #   ##   #####  ####  #    #
     #       #    # #    # #    # #      #         #  #  #  #  #    #   #    # #    #
     #       ###### #    # #    #  ####  #####     #  #  # #    #   #   #      ######
     #       #    # #    # #    #      # #         #  #  # ######   #   #      #    #
     #     # #    # #    # #    # #    # #         #  #  # #    #   #   #    # #    #
-    #####  #    #  ####   ####   ####  ######     ## ##  #    #   #    ####  #    #
+     #####  #    #  ####   ####   ####  ######     ## ##  #    #   #    ####  #    #
 
     #     #                                                       #     #
     #     #   ##   #####  #   ##   #####  #      ######  ####     #  #  # # #    #
     #     #  #  #  #    # #  #  #  #    # #      #      #         #  #  # # ##   #
     #     # #    # #    # # #    # #####  #      #####   ####     #  #  # # # #  #
-    #   #  ###### #####  # ###### #    # #      #           #    #  #  # # #  # #
-    # #   #    # #   #  # #    # #    # #      #      #    #    #  #  # # #   ##
-    #    #    # #    # # #    # #####  ###### ######  ####      ## ##  # #    #
+     #   #  ###### #####  # ###### #    # #      #           #    #  #  # # #  # #
+      # #   #    # #   #  # #    # #    # #      #      #    #    #  #  # # #   ##
+       #    #    # #    # # #    # #####  ###### ######  ####      ## ##  # #    #
 
     def _choose_auto_watches(self, my_locals):
         """
@@ -12297,7 +12297,7 @@ class _Debugger():
     #  #  # # # #  # #    # #    # #    #
     #  #  # # #  # # #    # #    # # ## #
     #  #  # # #   ## #    # #    # ##  ##
-    ## ##  # #    # #####   ####  #    #
+     ## ##  # #    # #####   ####  #    #
 
     def _build_floating_window(self, location=(None, None)):
         """
@@ -12378,7 +12378,7 @@ class _Debugger():
     #  #  # # # #  # #    # #    # #    #
     #  #  # # #  # # #    # #    # # ## #
     #  #  # # #   ## #    # #    # ##  ##
-    ## ##  # #    # #####   ####  #    #
+     ## ##  # #    # #####   ####  #    #
 
     def _refresh_floating_window(self):
         """ """
diff --git a/UserCreatedPrograms/Minesweeper.py b/UserCreatedPrograms/Minesweeper.py
new file mode 100644
index 00000000..963520f5
--- /dev/null
+++ b/UserCreatedPrograms/Minesweeper.py
@@ -0,0 +1,229 @@
+import PySimpleGUI as sg
+import random
+
+'''
+Source code of MineSweeper Game
+'''
+
+blank = b'iVBORw0KGgoAAAANSUhEUgAAAB4AAAAeCAYAAAA7MK6iAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAAEnQAABJ0Ad5mH3gAAAA5SURBVEhL7c0xAQAgDMTABynVU7MohAUN6ZJbMmbV6ZsB+xfnGOMY4xjjGOMY4xjjGOMY4xgzNE4euGMCWklhg+IAAAAASUVORK5CYII='
+bomb = b'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'
+flag = b'iVBORw0KGgoAAAANSUhEUgAAAB4AAAAeCAYAAAA7MK6iAAAE9ElEQVR4nL2WTWxUVRTHf+fe+147pbQKFChUipREKUYEEhAT2SgGNP0IpkkXsDCwIWHVdMWGuDEkRIwJC+OCEQkbiCB2ISQkiiHRlCIsnBqirZCWr1JqKRPBmXn3uJg37bR0qNHqP3nJzP363XPOPedeUVURESUvAbRlTf0zodWGocePrl3ovZeO+0KgAngAFMY7wDMhib9cUVsIZIr+o6pipkBpe7UuIWQuOOu/r51T/jbwprX2hDHmJ2NMyhhzVUQ+rK2tXeacyznnvHPOG2M8EMVQsda+IyKfAXOL1wcQERWKtB8MQOqVpTseRdH+c6mhPg9bmCJjDLlcbgT4CPgauAsEZWVlz2cymc0i0gysBUa89yuAsYKxxa4plgD6+Y6X5yS7b9258OtIZexKLbhRRDSKIr9x40bX3NxMTU0Nt2/f/iOZTAbXr18PrLWoKrH1t733rcCP8XxPCQnAx1tXlm1bvbi/PHQRIpExRo0xGgSBioju2bNH0+m0T6fT2YGBAe3v79f79+/rhg0bIhHJOuciY0wuntcRr21LQSfBW9bU/lBdESpIzsZg55wCOjw8rMlkUltbW3Xnzp26adMmr6r+0KFDCmgYhj6GPmCaGE+rtrb8zt5du+TUouqEgmRtkcXOOd27d6+mUim9ePGinjlzRs+fP68DAwPa0NCggDrn1BgTxd858id7EthMBQ8N5QeEVgYTgQF0fIr3nlwux+HDh+nu7iaRSBAEAXV1dTQ2NmKtpby8nCiKIB9PA3xDPp0mudqVstwZO5AIJsbGJ5nOzk6uXLlCT08Ply5dIp1OM2/ePFpaWjh27Bi7du3iyJEjOOckiiJUdR1P5vuTFhcUWBkod/luEYP3nvnz53Pw4EHOnj1LfX09XV1dnD59mqqqKjo7Ozl+/DgLFixAZMKrItJDnNtPtXjhwnyuOSe3yvJggyree6IoYvv27aRSKXbv3k1vby9jY2OMjo7S3NxMX18fxhhEhCiKBEBVXwc+AR7GcJ3W4saT+Y4glDuBNR7EeFUNgoDR0VGGh4e1o6NDV61axYEDB2hqauLo0aMkk0my2Szt7e1473HOeSASkc1ANUXFo5QEYP9bjfPeeHHhiLVGjTG5IAiyIuLb29u1r69P169fr7ELFdDq6mrdt2+fr6+vz4lIZK3VOKV6gFXxuiVDOw4+0dZmt7206JdEvogUFlFghHyJ1DAM1TmXC8MwS75SKaDGGBWRq8aY95g4zU/P41gGoHXNku+enVOmIL9ZkQ+cc69VVlYuAKorKirWicipwoastRqG4Ygx5gtrbQuTz8/fgo4XkdY1tV+9sHjup0BVqZnW2iZjzC5r7RZg4dTuUtBp87hQRECG1j9X/e21Ow/HltVTfuMGGSYOiQAaRVHXNDDI521UyrinBhv0VjqTWw3I8uXkmLiptOi3jQ0oWBcxEe+SmgHMoMUsmmGRwuU/I2xGcKGIqJhBRWuK22ZL08a4UEQM3CSf/Jw8WfoS/yea1uL3Y5f9mcncVaFs68qVZUy8Qv47cEF3E/fui6KJxKOa2QLOBFZALl8mq8LjyEWLAfb/Hxa3teX7BPndqCwF6G2bPXDJh8B4EVEdEqRuUtssaKY8BpFbQN1sAWcEj+etMojo1Br8r1XS1Zwk5upNYMWkzcyCjKpOG7cT8eNMA/kZ+BJmr4ioqvwF0Vn06LBZVccAAAAASUVORK5CYII='
+
+font        = 'Courier 16 bold'
+width       = 25
+height      = 14
+all         = 80
+new_start   = True
+size        = (30,30)
+# 0: 0, 1: hidden card, 2: bomb card, 3: flag card, 4: shown card
+im          = ['', blank, bomb,flag, '']
+color       = [('grey', 'grey'), ('black', 'green'),
+               ('black', 'green'), ('black', 'green'), ('black', 'grey')]
+
+def binding_all():                  # Bind right button of mouse to cell object
+
+    for x in range(width):
+        for y in range(height):
+            window[b[x][y].key].bind(
+                '<Button-3>', '+RIGHT')
+
+# Setting for top buttons
+def button1(text, key=None, disabled=False, button_color=('white', 'green')):
+
+    return sg.Button(text, pad=(10, 10), font=font, focus=False, key=key,
+            disabled=disabled, button_color=button_color)
+
+def button2(x, y):                  # define cell as instance of button and
+
+    b[x][y] = button(x,y)           # bulid Button
+    return b[x][y].button
+
+def check_blank(x, y):              # Check if cell near 0-bomb cel
+
+    if b[x][y].num==0: return False
+    for i in [-1, 0, 1]:
+        for j in [-1, 0, 1]:
+            if i==0 and j==0: continue
+            if ((0<=x+i<width) and (0<=y+j<height) and
+                (b[x+i][y+j].num==0)): return True
+    return False
+
+def check_num():                    # check number of bombs, flags and hides
+
+    bomb_count = flag_count = hide_count = 0
+    for x in range(width):
+        for y in range(height):
+            if b[x][y].state == 1:
+                hide_count += 1
+            elif b[x][y].state == 2:
+                bomb_count += 1
+            elif b[x][y].state == 3:
+                flag_count += 1
+    return bomb_count, flag_count, hide_count
+
+# Count number of bombs about cell
+def count_bomb(x, y):
+
+    global bomb
+    if bomb[x][y]==10: return 10
+    count = 0
+    for i in [-1, 0, 1]:
+        for j in [-1, 0, 1]:
+            if i==0 and j==0: continue
+            if ((0<=x+i<width) and (0<=y+j<height) and
+                (bomb[x+i][y+j]==10)):
+                count += 1
+    return count
+
+# set position for all boms
+def deal():
+
+    global bomb
+    bomb_list   = random.sample(range(width*height), all)
+    bomb        = [[0 for y in range(height)] for x in range(width)]
+
+    for x in range(width):
+        for y in range(height):
+            if x*height+y in bomb_list: bomb[x][y]=10
+
+    for x in range(width):
+        for y in range(height):
+            bomb[x][y] = count_bomb(x, y)
+
+    return
+
+def new_card():                     # refresh all cells to hidden card
+
+    for x in range(width):
+        for y in range(height):
+            b[x][y].state = 1
+            b[x][y].num = bomb[x][y]
+            b[x][y].color = color[1]
+            b[x][y].update(1)
+
+def show_blank():                   # Show all cell not around by any bomb
+
+    for x in range(width):
+        for y in range(height):
+            if b[x][y].num == 0:
+                b[x][y].update(0)
+            elif check_blank(x, y):
+                b[x][y].update(4)
+
+# Class for each button object
+class button():
+
+    def __init__(self, x, y):
+
+        self.x          = x
+        self.y          = y
+        self.state      = 1
+        self.color      = color[self.state]
+        self.disabled   = False
+        self.key        = (x,y)             # keys can be ANYTHING, not just strings
+        self.num        = bomb[x][y]
+        self.button     = sg.Button(' ',
+            auto_size_button=False,
+            border_width=2,
+            button_color=self.color,
+            disabled=self.disabled,
+            focus=False,
+            font=font,
+            image_size=size,
+            # image_filename=im[self.state],
+            image_data=im[self.state],
+            key=self.key,
+            pad=(1,1))
+
+    def right_click(self):   # Right_click handler
+
+        if self.state == 1:
+            self.update(3)
+        elif self.state == 3:
+            self.update(1)
+
+    def update(self, state):        # update state of cell
+
+        self.state = state
+        if state == 0:
+            self.disabled = True
+            text = ' '
+        elif state in [1,2,3]:
+            self.disabled = False
+            text = ' '
+        elif state == 4:
+            self.disabled = True
+            text = str(self.num)
+        self.color = color[self.state]
+        window[self.key].Widget['disabledforeground'] = 'white'
+        self.button.Update(text=text, disabled=self.disabled,
+            # image_filename=im[self.state],
+            image_data=im[self.state],
+            image_size=size,
+            button_color=self.color)
+
+# set theme for window
+sg.change_look_and_feel('DarkGreen')
+
+deal()  # Initial position of bombs
+b = [[0 for j in range(height)] for i in range(width)]
+
+layout  = [[button1('New Game', key='-New Game-'),  # Layout of window
+            button1('Game Over', key='-Game Over-'),
+            button1('Target:'+str(all), key='-Target-'),
+            button1('Bomb:0', key='-Count-Bomb-'),
+            button1('Flag:0', key='-Count-Flag-')]]+[
+            [button2(x, y) for x in range(width)] for y in range(height)]
+
+window = sg.Window('MineSweeper', layout=layout, finalize=True) # Create window
+binding_all()       # Binding right button event handler of all cells
+show_blank()        # Show all cells near no-bomb cell
+
+new_start   = True  # Flag for new game
+message     = False # Flag for game over message sent
+
+while True:
+
+    if new_start:   # Actions for new game
+
+        deal()
+        new_card()
+        show_blank()
+        message = False
+        new_start = False
+        pass
+
+    event, values = window.read()    # read window event
+
+    if event==None or event=='-Game Over-':     # Window close / Game over
+        break
+
+    elif event == '-New Game-':                 # New Game, set the flag
+        new_start = True
+
+    elif isinstance(event, tuple):              # buttons have tuple for event
+        right_click = False
+        if isinstance(event[0], tuple):         # if the tuple has a tuple, then it's a right click event
+            x,y = event[0]
+            right_click = True
+        else:
+            x, y = event
+        if not right_click:
+            if b[x][y].state == 1:
+                if b[x][y].num == 10:
+                    b[x][y].update(2)
+                else:
+                    b[x][y].update(4)
+        else:
+            b[x][y].right_click()
+    # Update number onf bombs, flags
+    bomb_num, flag_num, hide_num = check_num()
+    window['-Count-Bomb-'].Update(text='Bomb:'+str(bomb_num))
+    window['-Count-Flag-'].Update(text='Flag:'+str(flag_num))
+
+    # Check if game over
+    if hide_num==0 and (bomb_num+flag_num==all) and (not message):
+        message = True
+        sg.popup('Game Over', title='Note')
+
+window.close()
diff --git a/docs/index.md b/docs/index.md
index 906b6977..58e0e70f 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -14,7 +14,7 @@
 ![Awesome Meter](https://img.shields.io/badge/Awesome_meter-100-yellow.svg)
 ![Python Version](https://img.shields.io/badge/Python-2.7_3.x-yellow.svg)
 
-![Python Version](https://img.shields.io/badge/PySimpleGUI_For_Python_3.x_Version-4.11.0-red.svg?longCache=true&style=for-the-badge)
+![Python Version](https://img.shields.io/badge/PySimpleGUI_For_Python_3.x_Version-4.12.0-red.svg?longCache=true&style=for-the-badge)
 ![Python Version](https://img.shields.io/badge/PySimpleGUI_For_Python_2.7_Version-2.4.1-blue.svg?longCache=true&style=for-the-badge)
 
 ![Python Version](https://img.shields.io/badge/PySimpleGUIQt_Version-0.30.0-orange.svg?longCache=true&style=for-the-badge)
@@ -5424,6 +5424,7 @@ Button(button_text="",
     size=(None, None),
     auto_size_button=None,
     button_color=None,
+    disabled_button_color=None,
     use_ttk_buttons=None,
     font=None,
     bind_return_key=False,
@@ -5455,6 +5456,7 @@ Parameter Descriptions:
 |size|Tuple[int, int] (width, height) of the button in characters wide, rows high|
 |auto_size_button|(bool) if True the button size is sized to fit the text|
 |button_color|Tuple[str, str] (text color, background color) of button. Easy to remember which is which if you say "ON" between colors. "red" on "green".|
+|disabled_button_color|Tuple[str, str] colors to use when button is disabled (text, background). Use None for a color if don't want to change. Only ttk buttons support both text and background colors. tk buttons only support changing text color|
 |use_ttk_buttons|(bool) True = use ttk buttons. False = do not use ttk buttons. None (Default) = use ttk buttons only if on a Mac and not with button images|
 |font|Union[str, Tuple[str, int]] specifies the font family, size, etc|
 |bind_return_key|(bool) If True the return key will cause this button to be pressed|
@@ -5523,6 +5525,7 @@ Update(text=None,
     image_filename=None,
     visible=None,
     image_subsample=None,
+    disabled_button_color=(None, None),
     image_size=None)
 ```
 
@@ -5535,6 +5538,7 @@ Parameter Descriptions:
 |disabled|(bool) disable or enable state of the element|
 |image_data|Union[bytes, str] Raw or Base64 representation of the image to put on button. Choose either filename or data|
 |image_filename|(str) image filename if there is a button image. GIFs and PNGs only.|
+|disabled_button_color|Tuple[str, str] colors to use when button is disabled (text, background). Use None for a color if don't want to change. Only ttk buttons support both text and background colors. tk buttons only support changing text color|
 |visible|(bool) control visibility of element|
 |image_subsample|(int) amount to reduce the size of the image. Divides the size by this number. 2=1/2, 3=1/3, 4=1/4, etc|
 |image_size|Tuple[int, int] Size of the image in pixels (width, height)|
@@ -5687,6 +5691,7 @@ update(text=None,
     image_filename=None,
     visible=None,
     image_subsample=None,
+    disabled_button_color=(None, None),
     image_size=None)
 ```
 
@@ -5699,6 +5704,7 @@ Parameter Descriptions:
 |disabled|(bool) disable or enable state of the element|
 |image_data|Union[bytes, str] Raw or Base64 representation of the image to put on button. Choose either filename or data|
 |image_filename|(str) image filename if there is a button image. GIFs and PNGs only.|
+|disabled_button_color|Tuple[str, str] colors to use when button is disabled (text, background). Use None for a color if don't want to change. Only ttk buttons support both text and background colors. tk buttons only support changing text color|
 |visible|(bool) control visibility of element|
 |image_subsample|(int) amount to reduce the size of the image. Divides the size by this number. 2=1/2, 3=1/3, 4=1/4, etc|
 |image_size|Tuple[int, int] Size of the image in pixels (width, height)|
@@ -14307,6 +14313,8 @@ call and then have that same source run on plain PySimpleGUI.
 |---|---|
 | **return** |  |
 
+## Function Reference
+
 ```
 CButton(button_text,
     image_filename=None,
@@ -15021,6 +15029,39 @@ Parameter Descriptions:
 |||
 | **return** | (Button) |
 
+```
+Open(button_text="Open",
+    size=(None, None),
+    auto_size_button=None,
+    button_color=None,
+    disabled=False,
+    bind_return_key=True,
+    tooltip=None,
+    font=None,
+    focus=False,
+    pad=None,
+    key=None,
+    metadata=None)
+```
+
+Parameter Descriptions:
+
+|Name|Meaning|
+|---|---|
+|button_text|text in the button (Default value = 'Open')|
+|size|(w,h) w=characters-wide, h=rows-high|
+|auto_size_button|True if button size is determined by button text|
+|button_color|button color (foreground, background)|
+|disabled|set disable state for element (Default = False)|
+|bind_return_key|(Default = True)|
+|tooltip|(str) text, that will appear when mouse hovers over the element|
+|font|specifies the font family, size, etc|
+|focus|if focus should be set to this|
+|pad|Amount of padding to put around element|
+|key|Used with window.FindElement and with return values to uniquely identify this element|
+
+## OneLineProgressMeter
+
 ```
 OneLineProgressMeter(title,
     current_value,
@@ -15061,36 +15102,7 @@ Parameter Descriptions:
 |---|---|
 |key|Used with window.FindElement and with return values to uniquely identify this element|
 
-```
-Open(button_text="Open",
-    size=(None, None),
-    auto_size_button=None,
-    button_color=None,
-    disabled=False,
-    bind_return_key=True,
-    tooltip=None,
-    font=None,
-    focus=False,
-    pad=None,
-    key=None,
-    metadata=None)
-```
-
-Parameter Descriptions:
-
-|Name|Meaning|
-|---|---|
-|button_text|text in the button (Default value = 'Open')|
-|size|(w,h) w=characters-wide, h=rows-high|
-|auto_size_button|True if button size is determined by button text|
-|button_color|button color (foreground, background)|
-|disabled|set disable state for element (Default = False)|
-|bind_return_key|(Default = True)|
-|tooltip|(str) text, that will appear when mouse hovers over the element|
-|font|specifies the font family, size, etc|
-|focus|if focus should be set to this|
-|pad|Amount of padding to put around element|
-|key|Used with window.FindElement and with return values to uniquely identify this element|
+## Popup Functions
 
 Popup - Display a popup Window with as many parms as you wish to include.  This is the GUI equivalent of the
 "print" statement.  It's also great for "pausing" your program's flow until the user can read some error messages.
@@ -16453,6 +16465,8 @@ Parameter Descriptions:
 |||
 | **return** | (Button) |
 
+## PEP8 Function Bindings
+
 Change the "color scheme" of all future PySimpleGUI Windows.
 The scheme are string names that specify a group of colors. Background colors, text colors, button colors.
 There are 13 different color settings that are changed at one time using a single call to ChangeLookAndFeel
@@ -16634,6 +16648,8 @@ Parameter Descriptions:
 |---|---|
 |key|Used with window.FindElement and with return values to uniquely identify this element|
 
+## Popups
+
 Popup - Display a popup Window with as many parms as you wish to include.  This is the GUI equivalent of the
 "print" statement.  It's also great for "pausing" your program's flow until the user can read some error messages.
 
@@ -18981,7 +18997,24 @@ The Element & Window bindings release
 * Window.bind - New method for Windows, just like Elements
 	* Enables tkinter bindings to be added to Windows
 	* Will get an event returned from window.read() if the tkinter event happens
-* TabGround fonts - can now set the font and font size for Tab text
+* TabGroup fonts - can now set the font and font size for Tab text
+
+## 4.12.0 PySimpleGUI 14-Dec-2019
+
+Finally no more outlines around TK Elements on Linux
+
+* Fixed a long-term problem of the mysterious white border around (almost) all TK Elements on Linux
+* Ability to set the disabled button colors
+	* New Button and Button.update parameter - disabled_button_color
+	* Specified as (Text Color, Background Color) just like button colors
+	* For Normal / TK Buttons - can set button text color only
+	* For TTK Buttons - can set both a disabled button and text color
+	* Either parameter can be None to use current setting
+* Removed use of CloseButton from Popups (still have a bug in the CloseButton code but not in popups now)
+* Combobox - removed requirement of setting disabled if want to set to readonly using update method
+* Fix for cancelling out of file/folder browse on Linux caused target to be cleared instead of just cancelling
+* Removed try block around setting button colors - if user sets a bad color, well don't do that
+* Now deleting windows after closing them for popup
 
 ### Upcoming
 
diff --git a/readme.md b/readme.md
index 906b6977..58e0e70f 100644
--- a/readme.md
+++ b/readme.md
@@ -14,7 +14,7 @@
 ![Awesome Meter](https://img.shields.io/badge/Awesome_meter-100-yellow.svg)
 ![Python Version](https://img.shields.io/badge/Python-2.7_3.x-yellow.svg)
 
-![Python Version](https://img.shields.io/badge/PySimpleGUI_For_Python_3.x_Version-4.11.0-red.svg?longCache=true&style=for-the-badge)
+![Python Version](https://img.shields.io/badge/PySimpleGUI_For_Python_3.x_Version-4.12.0-red.svg?longCache=true&style=for-the-badge)
 ![Python Version](https://img.shields.io/badge/PySimpleGUI_For_Python_2.7_Version-2.4.1-blue.svg?longCache=true&style=for-the-badge)
 
 ![Python Version](https://img.shields.io/badge/PySimpleGUIQt_Version-0.30.0-orange.svg?longCache=true&style=for-the-badge)
@@ -5424,6 +5424,7 @@ Button(button_text="",
     size=(None, None),
     auto_size_button=None,
     button_color=None,
+    disabled_button_color=None,
     use_ttk_buttons=None,
     font=None,
     bind_return_key=False,
@@ -5455,6 +5456,7 @@ Parameter Descriptions:
 |size|Tuple[int, int] (width, height) of the button in characters wide, rows high|
 |auto_size_button|(bool) if True the button size is sized to fit the text|
 |button_color|Tuple[str, str] (text color, background color) of button. Easy to remember which is which if you say "ON" between colors. "red" on "green".|
+|disabled_button_color|Tuple[str, str] colors to use when button is disabled (text, background). Use None for a color if don't want to change. Only ttk buttons support both text and background colors. tk buttons only support changing text color|
 |use_ttk_buttons|(bool) True = use ttk buttons. False = do not use ttk buttons. None (Default) = use ttk buttons only if on a Mac and not with button images|
 |font|Union[str, Tuple[str, int]] specifies the font family, size, etc|
 |bind_return_key|(bool) If True the return key will cause this button to be pressed|
@@ -5523,6 +5525,7 @@ Update(text=None,
     image_filename=None,
     visible=None,
     image_subsample=None,
+    disabled_button_color=(None, None),
     image_size=None)
 ```
 
@@ -5535,6 +5538,7 @@ Parameter Descriptions:
 |disabled|(bool) disable or enable state of the element|
 |image_data|Union[bytes, str] Raw or Base64 representation of the image to put on button. Choose either filename or data|
 |image_filename|(str) image filename if there is a button image. GIFs and PNGs only.|
+|disabled_button_color|Tuple[str, str] colors to use when button is disabled (text, background). Use None for a color if don't want to change. Only ttk buttons support both text and background colors. tk buttons only support changing text color|
 |visible|(bool) control visibility of element|
 |image_subsample|(int) amount to reduce the size of the image. Divides the size by this number. 2=1/2, 3=1/3, 4=1/4, etc|
 |image_size|Tuple[int, int] Size of the image in pixels (width, height)|
@@ -5687,6 +5691,7 @@ update(text=None,
     image_filename=None,
     visible=None,
     image_subsample=None,
+    disabled_button_color=(None, None),
     image_size=None)
 ```
 
@@ -5699,6 +5704,7 @@ Parameter Descriptions:
 |disabled|(bool) disable or enable state of the element|
 |image_data|Union[bytes, str] Raw or Base64 representation of the image to put on button. Choose either filename or data|
 |image_filename|(str) image filename if there is a button image. GIFs and PNGs only.|
+|disabled_button_color|Tuple[str, str] colors to use when button is disabled (text, background). Use None for a color if don't want to change. Only ttk buttons support both text and background colors. tk buttons only support changing text color|
 |visible|(bool) control visibility of element|
 |image_subsample|(int) amount to reduce the size of the image. Divides the size by this number. 2=1/2, 3=1/3, 4=1/4, etc|
 |image_size|Tuple[int, int] Size of the image in pixels (width, height)|
@@ -14307,6 +14313,8 @@ call and then have that same source run on plain PySimpleGUI.
 |---|---|
 | **return** |  |
 
+## Function Reference
+
 ```
 CButton(button_text,
     image_filename=None,
@@ -15021,6 +15029,39 @@ Parameter Descriptions:
 |||
 | **return** | (Button) |
 
+```
+Open(button_text="Open",
+    size=(None, None),
+    auto_size_button=None,
+    button_color=None,
+    disabled=False,
+    bind_return_key=True,
+    tooltip=None,
+    font=None,
+    focus=False,
+    pad=None,
+    key=None,
+    metadata=None)
+```
+
+Parameter Descriptions:
+
+|Name|Meaning|
+|---|---|
+|button_text|text in the button (Default value = 'Open')|
+|size|(w,h) w=characters-wide, h=rows-high|
+|auto_size_button|True if button size is determined by button text|
+|button_color|button color (foreground, background)|
+|disabled|set disable state for element (Default = False)|
+|bind_return_key|(Default = True)|
+|tooltip|(str) text, that will appear when mouse hovers over the element|
+|font|specifies the font family, size, etc|
+|focus|if focus should be set to this|
+|pad|Amount of padding to put around element|
+|key|Used with window.FindElement and with return values to uniquely identify this element|
+
+## OneLineProgressMeter
+
 ```
 OneLineProgressMeter(title,
     current_value,
@@ -15061,36 +15102,7 @@ Parameter Descriptions:
 |---|---|
 |key|Used with window.FindElement and with return values to uniquely identify this element|
 
-```
-Open(button_text="Open",
-    size=(None, None),
-    auto_size_button=None,
-    button_color=None,
-    disabled=False,
-    bind_return_key=True,
-    tooltip=None,
-    font=None,
-    focus=False,
-    pad=None,
-    key=None,
-    metadata=None)
-```
-
-Parameter Descriptions:
-
-|Name|Meaning|
-|---|---|
-|button_text|text in the button (Default value = 'Open')|
-|size|(w,h) w=characters-wide, h=rows-high|
-|auto_size_button|True if button size is determined by button text|
-|button_color|button color (foreground, background)|
-|disabled|set disable state for element (Default = False)|
-|bind_return_key|(Default = True)|
-|tooltip|(str) text, that will appear when mouse hovers over the element|
-|font|specifies the font family, size, etc|
-|focus|if focus should be set to this|
-|pad|Amount of padding to put around element|
-|key|Used with window.FindElement and with return values to uniquely identify this element|
+## Popup Functions
 
 Popup - Display a popup Window with as many parms as you wish to include.  This is the GUI equivalent of the
 "print" statement.  It's also great for "pausing" your program's flow until the user can read some error messages.
@@ -16453,6 +16465,8 @@ Parameter Descriptions:
 |||
 | **return** | (Button) |
 
+## PEP8 Function Bindings
+
 Change the "color scheme" of all future PySimpleGUI Windows.
 The scheme are string names that specify a group of colors. Background colors, text colors, button colors.
 There are 13 different color settings that are changed at one time using a single call to ChangeLookAndFeel
@@ -16634,6 +16648,8 @@ Parameter Descriptions:
 |---|---|
 |key|Used with window.FindElement and with return values to uniquely identify this element|
 
+## Popups
+
 Popup - Display a popup Window with as many parms as you wish to include.  This is the GUI equivalent of the
 "print" statement.  It's also great for "pausing" your program's flow until the user can read some error messages.
 
@@ -18981,7 +18997,24 @@ The Element & Window bindings release
 * Window.bind - New method for Windows, just like Elements
 	* Enables tkinter bindings to be added to Windows
 	* Will get an event returned from window.read() if the tkinter event happens
-* TabGround fonts - can now set the font and font size for Tab text
+* TabGroup fonts - can now set the font and font size for Tab text
+
+## 4.12.0 PySimpleGUI 14-Dec-2019
+
+Finally no more outlines around TK Elements on Linux
+
+* Fixed a long-term problem of the mysterious white border around (almost) all TK Elements on Linux
+* Ability to set the disabled button colors
+	* New Button and Button.update parameter - disabled_button_color
+	* Specified as (Text Color, Background Color) just like button colors
+	* For Normal / TK Buttons - can set button text color only
+	* For TTK Buttons - can set both a disabled button and text color
+	* Either parameter can be None to use current setting
+* Removed use of CloseButton from Popups (still have a bug in the CloseButton code but not in popups now)
+* Combobox - removed requirement of setting disabled if want to set to readonly using update method
+* Fix for cancelling out of file/folder browse on Linux caused target to be cleared instead of just cancelling
+* Removed try block around setting button colors - if user sets a bad color, well don't do that
+* Now deleting windows after closing them for popup
 
 ### Upcoming