I also had trouble getting my file to download
after updating the firmware. After deleting stuff
and using what I learned from this thread, I found
the culprit. It was the devices I had with no
pages in them. I have my iPronto set up for 3
rooms in my house and I divided these rooms with
"-----------------" so I could see them better
in my editing tree on the left side. Once I removed
these it downloaded with no problem. Not sure
why this caused the problem.