I'm not the one who asked this question but I'm very happy to have the solution! I had the same problem trying to open my Finale 2011 files in Finale 25. My excuse is that I thought the .mus suffix...
Thank you very much for this help Mike Halloran and J Adrian Verkouteren! I wasn't aware of either of these tips and am now using both of them. Also, I'm sorry to take so long to respond; I just sa...