Database Crash

Not sure if anyone reads this any longer, but i've been a user for a really long time, and have over 100,000 titles in my database. for whatever reason, my database crashed while backing up this morning. I now cannot open the database. I get the following message "Could not open database. Would you like to browse for the database file." It still won't open. I've tried to uninstall and reinstall orange CD with no success. Anyone out there with any ideas? This is really depressing as i've found this software to provide the best all-around database.

John