Thanks Matt
I must admit, I did give up on Musescore a couple of years ago. It looked good, but didn't interface well with BIAB. I also tried it when they said it read BIAB files, but it still didn't work for me. So when Mario mentioned it again, I thought it was worth another test. Nothing yet!

I'll look into the Beta version, and follow up with Musescore. As they are using the .MGU file, they should be able to extract all the notation information. When they tried to use a midi output from BIAB, there simply wasn't enough information, so as long as someone can reverse engineer the .MGU, (or PGMusic provides the file layout) getting a clean piece of notation might work. Wouldn't it be nice if all this was under the covers, and we were able to get Musescore notation without changing programs?

BIAB for Windows Version 2019 (643)
Windows 10 (1909)