I few months back I I was having trouble with Opus working in Sonar.  I finally have it working. thanks to Michael from E.W.  Here is the procedure that helped me. Update for Case 131265 - "Opus" Hey Tom, I'm not seeing we have any other e-mail from you since 2014. However, if the standalone version of Opus will not open, the plugin definitely won't either. Also, I do see you have some old blue iLok 1 keys, but you have nothing on them - Opus and the latest play are both incompatibl