Corrupt category.db

[ghandi333]

I had a tree of 500 categories. Somehow by opening a 2nd instance of xnview my category.db is now corrupt, and all the names are messed up.

eg I have

Icons
Icons
Icons
Icons

where I never had 'Icons' before.
Subfolders are also like that

[xnview]

I've received your email, i'll check asap.
Do you have category.bak (before corrupt)?