No I'm not sure at all. I thought that Cronus.dll was something to do with V-Vocal. I have mine excluded as that used to be a fix for V-Vocal crashing many moons ago.
Whether that is still the case I have no idea, but mine's still excluded, V-vocal still works, I use it all the time and I haven't had a V-vocal crash in several years.
I'd contact support if I were you, or perhaps try uninstalling and re-installing Sonar to see if it's an install issue.