I open my database after a while and it still measures 10 Mb but it only displays 1 movie.
The .bak is only 1 kb smaller and does the same thing.
I;m using AMC 3.5.0
Unfortunately I can't do much for that. I do not know why that happens to few people, and I couldn't reproduce the problem yet.
There were how many movies in the catalog? I can maybe check if I can get at least some back if you send me the file by e-mail.