I woke up at 4:30 this morning and decided to just sit down and get this done. So I did just that. Pounded out the code, then fixed what I broke by changing things, fixed a few bugs, compiled it, and uploaded it. Enjoy Roster Builder 4.0!
July 12 UPDATE: If you downloaded Roster Builder between Saturday 7-10 and now, you got RB 3.9, and you also now get my apologies. I have fixed it and you will now get RB 4.