Some users report that installing the old "Cakewalk Command Center" can still download 8.5 if you previously owned it. If you have an old account login from 2010-2015, log in immediately. BandLab has preserved some legacy download links for verified owners.
Have you successfully installed SONAR 8.5 on Windows 11? Share your tips in the comments below (but keep it legal!). sonar 8.5 producer download full