Dunno, have had the same problem. I downloaded and installed version 8 on my device and got my old account back. I think I'm currently in a trial mode somehow, but I'm not sure since I got my old favorites and settings. Maybe they give it away for free to people who's already got v7? (yeah right)

Wayfinder 8 is far better than 7 so I'd like to upgrade if I could :P