For those who use Keepass 2.20:
Keepass 2.20 give this message error: “your database is corrupted” when you open a database modified by KyPass.
Don’t be afraid !
Database is not corrupted! There is a bug with KeePass 2.20. (New header protection in fact).
And you could still open your database with Keepass 2.19 on your PC at http://sourceforge.net/projects/keepass/files/KeePass%202.x/2.19/
I’ll release quickly a fix for KyPass v2 (AND v1 also)