Thanks for providing the dump files. I have replied to your ticket with information about the crash which is a divide by zero error in the plugin you are using. You should contact the developer and give them the dump files.
I am closing this case for now since it is a third party crash.

I will do that...it's strange that I wasn't having any trouble with it until recently...oh well. Is there any way to open the project without that plugin?

Yes hold down the shift key when opening the project. This will launch in safe mode and allow you to skip the plugins that you want to ignore.
Alternatively you can remove the dll and let SONAR rescan before opening that project again...
 
Bugs with plugins can be latent or not show up until specific conditions are met so its a bit of a crap shoot.