Can't Close or Save my document!

Help!... I was working in a text box...left for lunch...came back, and everything is "frozen" I can't get back into the text boxes to make edits, if I click into "edit text" I can make changes, but I can't save or close the program?

I have gone from X3 to X7 ... Does X7 have some kind of "sleep mode" that I am not aware of!!??