Ooof.. if it happened to crash while it was trying to auto-save your game, you might be hosed.
Send me the Save folder zipped up via e-mail ( ferretdev.org at gmail.com ) or via a link on Dropbox or something and I'll see if there's any salvaging it when I get home from work tonight.
Hmm.. maybe I can think of a way to secure against this better... but most of the easy ways I think of off the top of my head seem like they'd be a massive slow down for fighting a very rare occurrence.
If you get impatient, simply delete the Save folder and you should be able to start a new game. If that doesn't work, kill off Records too.
Edit: At the very least, I should probably have something to handle the case of corrupted data.
Not sure it will make it into the current build, but I've added it to the list.