I’m running build 459 at the moment. Problems didn’t start until that build was installed. It’s an older (5 years) high-end laptop with Windows 7, as I recall. Maybe it’s time to upgrade. I discussed the matter with PG Tech Support. They told me about running As Administrator. That has helped. The laptop is only used with BIAB for live gigs----about 4 to 5 a week. So, this is a big deal for me. May have to go back to the arranger keyboard. The issue, now, is that none of my “frozen” tunes will load and play. It will lock-up every time. Unfrozen songs play just fine. Kind of weird. Thanks for the responses.