I can't find them any where. Note, I'll admit I'm a new Mac user, so I may be missing an obvious location, however, I can't find it in my personal folder. Any suggestions?
Correct locations might be either
~/Library/Application Support/Diablominer or
Of course it might be in in an incorrect location. Super Meat Boy, for instance, stores its configuration inside the .app itself (brrr). To check there you have to right click the app and "show package contents".
The best way to find this configuration file, if you already know at least the file name, is casting
find ~ -name filename, hoping at least it is somewhere in your home directory.