Whenever I close a project that uses the Integra 7 VST3 I get
"SonarPLT.exe has stopped working"
 
Can the Crash Dump help me find out where the problem lies?
 
I have Win7 64, all drivers, firmware and software is up-to-date  
and yes I am aware of K Taki's stand-alone editor but I want to get this working.

Crash dumps really only help the developers in this case.  A crash dump can tell you what is crashing, which can help if you aren't sure, but in this case it sounds like you already know.  SONAR has a few issues with VST3 plugins, is there a VST2 version of the plugin available?  You might want to try that (and disable the VST3 one in the Cakewalk Plugin Manager).  Short of that you'd need to contact Roland and see if they can help.