I changed my carrier name, excited MakeItMine and decided a few minutes later I didn't like it so I went back in and as soon as the keyboard comes up it crashes. I tried uninstalling then restarting and reinstalling it but it keeps crashing.
I used MobileFinder to try to find a preferences file for it but I couldn't find it.
The new MIM includes admob, so if you modified your host file, there's a good chance that's causing it to crash. Either edit out the admob line or go back to your original host file for now.