Help Cakewalk! Cannot open MASTER.INS. No instrument definitions will be available

I installed the 6.2 patch and "Cannot open MASTER.INS. No instrument definitions will be available" came up in a window. I backed up my files, deleted Sonar 6 PE, reinstalled it, reinstalled the patch and the same window comes up every time I open up Sonar.
Does anyone (Cakewalk?) know what this means and what I should do?
Thanks-Pete