I've released yet another update. This latest update only changes the GUI, all of the functionality is the same. Here's a screenshot:
As you can see, I've taken Mac+ advice and switched to drop-downs instead of radio buttons, which reduces how much screen space my program uses.
Proper display of enharmonics is my next priority. Hopefully I can get the next update out the door within the next 2 weeks.
[edit]
ast3r3x,
What do you think of my new font selection?