Lesson learned - Change only one string at a time. Long ago I heard that you could damage a guitar if you took off all the strings. It would seem to me that damage would be more likely to occur when all but one or two strings were removed, especially if the remaining strings were either the 1st and/or 2nd or the 5th and/or 6th.
Bye the way, there are no stupid questions. Howevere here at the 'cat, you'll find some pretty tangential responses from time to time. Good luck to you, and Happy chords.