Sonar freezing after upgrade

I'm what you might call a very sporadic user of Sonar, as my interest in making music varies, but recently I started recording again and using my Sonar X3 and had some issues with crashing. I removed every Cakewalk related folder (including old Music Creator files) ,reinstalled and the crashes stopped, but I still found the software buggy, so I upgraded to Sonar Artist and now the program started freezing again and since I can't see that the bugs that were annoying me has gone, I'm considering either cancelling my Artist and going back to X3 or removing it and do a clean Artist install. Anybody have any experience with these freezing ? Is there a log that can find the reason ? Obviously it's annoying to have to redo the work after a crash.

Thanks for your input. Sonar is installed on a SSD disk and that was performing fine with X3. I have downloaded some VST synths but none was used in the project that kept crashing.  My CPU does run a bit on the hot side andI don't know if that can be the cause.

I have a an OK new motherboard with an AMD FX processor. I use an AKAI EIE for sound. I have a 64 bit system and I use some 32 bit VST's like Cakewalk Sound center, but these have never given me troubles in the past.
 
I just had a crash and for the 2nd time the undo function did it. I have 2 types of crashed. One where the system becomes unresponsive, usually after an edit function and one where Sonar informs me that it crashed and enables me to send a crash report, usually after opening a project.