Tobye - Did you have the appMobi plugin I'm working on in the appmobi folder under plugins? If so, then when you update C2, it overwrites it. What I would do is:
Add the newest plugin appmobiDev to the plugins folder
Then copy the contents of appmobiDev into appmobi as well (note COPY not MOVE)
Then do a global search and replace for "appmobidev" and change to "appmobi" in the appmobi plugin folder. This will allow you to open your game. Once you have it open, switch your appmobi references to use the appmobiDev plugin.
Then delete the appmobi object.
This way when you upgrade C2 again it wont be a problem.
If I still had the plugin named just "appmobi" you could just replace and be all set, but that was causing confusion for some.
Let me know if that helps.