Wow - misery loves company! I had a similar problem with FTM 2010 back in November and suddenly, without warning, the same thing has happened again. I just got off the phone with tech support and he doesn't seem to want to do anything until I uninstall and reinstall FTM 2010. I basically read him all of my old correspondance and told him that I really didn't want to do this, and I don't think it would work anyway!
At this point I think the only solution will come when the developers, who fixed it last November - fix it again!!!