QV Personal edition just stopped recognizing my existing docs as of this morning. I have been building apps for several weeks now and I just started seeing the "The QlikView document was created by another QlikView Personal Edition user...".
This is incorrect as I am the only one to have worked on this document (I built it from scratch).
I suppose I could use 1 of the 4 recover options but that shouldnt be necessary.
I think below links might be a good reference for you,