Alright, I hope I haven't missed someone else reporting this problem already.
First off, Sappy does open for me, but when I try to open a ROM such as Fire Red or Emerald, or actually ANY ROM is says the following:
The game you loaded (gamecode [insert 4 letter header here]) is not known.
Would you like to scan for the song table now?
I say yes, it says something about an xml file for easy future loading, and then continues to run, but without any song or game information whatsoever.