Calibre doesn't start

The application shows up in the task manager.

I had my library on a network drive (yeah, I didn't read the FAQ beforehand). The IP changed and when it started up it said it couldn't find it and asked me to point it to the new directory. I did so and then it froze.

I killed it and tried to restart it but the same thing keeps happening.

I was thinking that maybe I need to edit the config files by hand or something. But I'm not sure where. I can't find where they are stored. I've searched but I've only found that if you open the program you can click in the preferences and it will open the location.