This is really a rhetorical question because I discovered a workaround but maybe somebody new doesn't know this. I have been using Band-in-a-Box since at least 2007 - I know this because I found some songs I created then. I have both .MGU and .SGU files in folders. If I right click and select "Open With bbw64.exe" everything is fine. If I'm in BiaB and I use the drop down for import and I choose that same file some things are different: certain instruments are missing, if the song has 36 bars it will play to bar 53 just playing a C chord repeatedly, my repeat notations are gone and key changes, etc.. It doesn't matter but is this a known 'issue'? It takes me 20 minutes to play a 3 minute song on my keyboard and a day to transcribe a song so I appreciate BiaB allowing me to experiment with different styles, keys and tempos without getting frustrated and quitting. I enjoy the process of writing music and this allows me to do so. Thank you.