10 hours ago
The workaround that worked for me is to press the F11 key to exit full screen, then click the middle button at top right to reduce from maximum size window. I like to work with the windows at maximum size without going full screen, so my next step is to stretch the window sideways by clicking and dragging the right edge of the window as far as possible, the doing the same with the bottom edge to fill the screen. Next, I go to Edit | Preferences, click on Window Management, and check the box for Save window positions on exit. Next time you open GIMP, it should open the window at the same size it was when last closed. I do it this way because I found that when I exit full screen to maximized position, even with the Save windows positions on exit checked, it will still revert to full screen when next opened, hiding the minimize and close buttons at top right until you press F11. I hope this explanation helps.