I've had this problem a few days ago. My guess is that it was a windows-related problem that somehow involved access to the database.
The easiest way to solve it is by restoring your stevefire-file from a backup (before you encountered the problem, and backup your current version first before you overwrite it).
However, that doesn't prevent it from occuring again. Since then I've reinstalled Aurora in a folder other than Program Files, and I haven't had the problem since (Program Files has some weird windows administrator rights connected to it, which wreck havoc with database updating or restoring from backups). If you have Aurora installed in Program Files, backup your stevefire save, reinstall Aurora in some other folder and put your save file in.