nothing to forgive! I'm as novice as can be and just thankful to anyone willing to help!

When her "accident" happened she actually had been working on a letter (document). she then decided to pull up (from the start>documents route) a previous document that she had worked on the previous day.

From that document she highlighted a section and clicked edit>copy. She then closed that document and went back to the one she was working on but when she pulled it up she got the "do you want to revert" prompt. She clicked yes.

Ever since, we cannot run two documents, individually named or otherwise.