Full Screen mode

Hs anyone ever gotten stuck in full screen mode, while working in Daz?
I press exit, but nothing happens. The only way I can even exit, is to cut power to the computer.
I'd like to use full screen mode, sometimes, but I need to be able to get out of it, when I need to.
Does this sound like a computer issue, or Daz software issue?
Comments
Thank You! Getting stuck in FS mode, rather defeated the upside of it. Thanks, again!