You would just re-export it as Mac said
Current version uses the Audio pulldown, then re-Merge Audio to stereo wav file.
As long as all the sliders are up to full you should hear no apparent loss this way.
Filenames at top are grabbed from SEQ, MGU and SGU files, a wav file won't show the name in the title bar, but *should* show it in the track name.

I do not work here, but the benefits are still awesome
Make your sound your own!