Sorry, things are a bit busy at work. I will create another 5 projects
soon. Like I said, the problem is intermittent, so creating 5 new boards
might not immediately give the error. Try leaving the 5 projects you
created open and export a couple of hours later.
What I noticed today, was that not only did it use the previous file's name
(from the other project), but it actually exported that particular board.
It wasn't just a name confusion. The export was actually still "stuck" on
the previously exported project, even though I "tabbed" away to another
project, and are trying to export that project's one file. PS: I am doing a
one screen export and not a complete project export.