[njw7]

I'm getting the following when I open. I just upgraded to the latest version. Any ideas?

12/18/08 5:35:01 PM calibre[921] calibre Error
An unexpected error has occurred during execution of the main script

DatabaseException: unable to open database file
RemoteTraceback (most recent call last):
File "calibre/library/sqlite.pyo", line 80, in run
OperationalError: unable to open database file