So the following (Windows shortcuts) don't work when in full screen mode, but, they do work in Windowed mode:
Open Preferences: ALT+F, followed by P
Open Controller Manager: ALT+F, followed by C
Open Audio Setup: ALT+F, followed by A
Kinda makes sense, since the menu bar is hidden...
Can anyone confirm that this is software issue, and not a user/fat finger issue???