[SOLVED] Database Restore - Atahualpa Settings gone (total panic...)

Hi,
I've had to move to a new database. So what I did was
1. put WP in maintenance
2. export database via PHPMySQL
3. Import into new Database via PHPMySQL
4. reconfigure wp-config.
5. exit maintenance mode

The result: The design has changed a lot. After a first panic attack I realized that Atahualpa (I am using 3.7.7) has gone back to a very old revision of my design that is at least 6 months old.

What could have happened? Does Ata still store all the variables in the DB (I remember there has been a change in the way it handles its design settings a while ago)? Or have they moved to a separate text file? I am at a total loss and have no idea how to fix this. Unfortunately, the old database seems to be broken now as well. It is possible, though, that while importing to the new databse (had to do it in small packages) I switched to the old database (in a separate window) to check something and the import to the new DB actually went to the old one (some strange PHPMySQL-behaviour - never open it in separate windows...).
So, of course I got backups, but obviously they don't work. Could there be anything wrong with the character set?

Or what? Please help me. Thank you.