Changing to full screen freezes in full screen.

[Carl Webster]

After clicking on the full screen button the window freezes in full screen. Top row of buttons starting with,  File, don't work and unable to return to smaller screen. The top left buttons are gone so I can't minimize the window. Taskbar doesn't come up. I have to hard off the computer. I uninstalled the program and installed from new download with no change. Was working fine until I went to full screen. Windows 10.