Program crashed and can't run

Suddenly the Windows program generated an error and it shut down and I can't run it...

Changing name of the database caused creating new folder on DropBox, so now it's working.

One of the automatic sync files is corrupted. Uninstalling the app should clear the cache. Perhaps this file located in cloud.

Ok, I've changed the name of the database and it's working - I hope the error won't come again...

I've checked that the error appears after loading database to program...

After restarting the program the same error appeared...

OK, it's working, thanks :)

There was email with you key when you bought the app.

Ok, but now I need my key for full version, where I can find it?

Hello.
Try to uninstall and reinstall the app.