hot damn, I didn't expect such a quick response!
I still seem to be having trouble getting the multiuser up and running (CORS has me REALLY stumped), so I think I'll wait for the videos you mentioned to be available before I try again.
As for the export/restore bug, I dunno what I did, but suddenly things are working just fine and I can't seem to recreate it. I'll have to keep an eye out to see if it doesn't come up again, but I suspect it has something to do with the portable version. I know I had downloaded the installer instead, and now both versions seem to work.
I'll try putting the portable version on my laptop when I get it back from (insert name of person borrowing laptop), and see if I can't recreate the issue there.