First I'll apologize. A couple of you were bitten by a really nasty bug. As far as I can tell, it's really only 2 people (Wuffell is one of them, cause he emailed me about it).
If you are effected by this bug, your game saves are totally fubared.
Here's what happened: a) I added some anti-cheat stuff (which works fine) and b) some stuff to better handle upgrading between version (which didn't work fine). b cause a to go nuts and mess up the files.
If you are effected, I have added code in this patch that will allow you to load the game again, and give you 25,000 gold in your academy for your troubles, but your campaign will be reset back to the beginning. Sorry!