Fullscreen Issue in RW7

Arrrggghhh… got shocked this morning cause I thought I’ve lost 2 hour of my work (woke up early this morning). Usually I am working in full-screen mode switching between the screens with 4-fingers gesture. When I wanted to side-open an older project my Rapidweaver got stucked suddenly and was kind of freezed. But it still reacted to key strokes (it beeped). After unplugging my external display from my MacBook Pro I’ve got this screen. However, I coulnd’t click on continue nor pressing Enter or Escape or Cmd-Anything Keys helped to activate RW7. After Forced-Quitting I was lucky, that my work - of course unsaved for a longer time - was still there.