I am developing my first application and I used one of Apple's sample programs as my starting point. I've gotten pretty far with it but when I went to rename it, it would crash as soon as I also renamed the AppDelegate class that was in the example. If I renamed it back to the original name, it would run again so I know that was the specific issue. When I run it (with the new name) in the debugger, it crashes before it ever even gets to main() so I really have no idea what the issue is or where it is still retaining the old name, and thus trying to load the old class name unsuccessfully. Any help would be appreciated.