Twice lately, I have had a problem with SONAR crashing as soon as a project was fully loaded.
In the most recent instance, I discovered that the project would open and not crash only if I opened it by clicking on the .cwp file with SONAR closed.
If I tried to open the project from this Start Screen, it crashed every time. The same thing happened if I used Edit|Open and scrolled to the project file.
There are a couple of other permutations I need to try. If I learn anything I'll report back.