I just found this discussion because I've been away from the forums here for close to a year, so I had to comment because I had no idea that MuseScore could import SGU and MGU files. I've been using MuseScore 2.1 to create XML files of my songs for importation into BiaB, and I've been using MuseScore 3.3.4 to re-save those same song files from version 2.1 for processing with a Python script for importation into Synthesizer V (that's how I create vocals for my demos). So, this info about importing BiaB files into MuseScore may come in handy for me in the future. I'll be following this conversation. Thanks!