I went ahead and uploaded the new version with some limited support for the instrument types the last one was missing. It's at the same link.
As a bonus here's a
GBA audio ripping tool I put together (.zip 33.2KB). If you drag & drop a ROM file on it, it'll dump the audio data from the ROM to "output.gbas" which can be played by GBAjukebox. Unfortunately for you Mac/Linux users though it's a Win32 executable.
EDIT:
Link for audio ripper fixed >_<