Let me know if I can help you with further info.
I still don't have a clue, but your story makes it easy to take more stabs in the dark...
A few days ago I installed the new version...
What version were you using before this?
...and I've been using it without a problem.
Including importing movies from IMDb?
Today my database crashed.
Depending on what you mean by "crash," I suppose this might be the sort of event that could corrupt a database...
I replaced it with my latest backup from yesterday and it didn't work.
...but then this should have fixed it. How, exactly, did it not work?
But 1st thing I find out is this error when I try to import a movie from IMDB.
Just to be clear, the same error happens when you attempt to import to an empty database?
Try starting the program with
portable.bat (in the installation directory) to see if your configuration file has anything to do with the problem.
Were you able to send any error reports?