Dear thumpinc, Blick, and WeatherCat fans,
Let me also welcome you to the forum!
Adding to Blick's suggestion. if you have any sort of backups (like Time Machine,) you might be able to restore your corrupted file from an earlier back up. If you try to do this, shutdown WeatherCat first, reboot your computer and only then try to restore the file. Then reboot one more time before attempting to run WeatherCat. The problem with Yosemite is that it has a preference file caching system. Rebooting forces the caching software to go back to the actual file. I'm not sure the first reboot is absolutely necessary, but it is a precaution.
Cheers, Edouard
![Cheers [cheers1]](https://athena.trixology.com/Smileys/default/food-smiley-004.gif)