I have The Rocket, Bombardier, Event Horizon+ and Major Tom. All these plug-ins show the following behaviour in Sonar 8.5.3 x64 under Win 7 x64.
When I right-click a knob on the GUI of the mentioned plugs, it shows its value in a popup. The next click (regardless of left or right mouse button) crashes Sonar. This is 100 % reproducible here. It only happens in Sonar x64 using your 64-bit plug-ins. The 32-bit versions work fine in x86 Sonar. It happens in full blown projects as well as completely new ones.