Hi. I've had this issue in the past but it seems to be happening more regularly of late. I'll start Sonar and go to 'existing projects' on the Start Screen and it will on occasion crash to the desktop. After restarting it's fine...every time it does this.
 
Also, I'm getting the same issue when 'on occasion, after working on a project, I'll go to 'save as' for a current dated version, it'll do the same thing as above. Fortunately, I always save before I do so. It doesn't always occur though...like a random occurrence. If I restart Sonar and once loaded, I go to 'save as', it's okay. 
 
Anyone experiencing this. I've just updated as well and it was happening before this and now it seems to be a bit more regular.
 
Ta
 
 

anything in windows event log?

Just a lot of stuff that I have no clue if relevant to this issue. No critical error but certainly a lot of 'errors' that throw up more possible issues that as I mentioned, may or may not be related. I couldn't anything that points to there were 2 CTD. There is apparently a bad block on my of my HDD's, so I'll run a check disk.

you need to look for the time the crash happened in the log... if it's repeatable, clear the log first, cause the crash, then look in the log
/hth good luck