I am running it on my Mac Pro, latest Mavericks version, and latest version of the app. It is unusable right now since it crashes on launch. I get this in the log: Application Specific Information: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber length]: unrecognized selector sent to instance 0xf9762fc7990df37' terminating with uncaught exception of type NSException abort() called Any idea how I can fix this? I tried deleting the plist files etc. No luck.