Ok, I have re-installed Neutron with only VST3 (thanks, Paulo).
I did this after removing all remnants of previous install, but still have the 'crash'.
All is good, real time analysis display choppy, until i run the assistant.
Then, as the music goes on smoothly and the mix becomes clearer, the Sonar screen hangs in fits and starts then hangs forever until you while the music plays.
I am wondering if it is my ancient GeForce GT 240 video card in my 2.6GHz., i7 Quadcore Win7 64 pro.
However, I did notice one of the eight processors in sonar spike and the rest shut off, and then it stayed that way, even after closing the project. Hmm... Maybe i should open a new thread?