Canon EOS Utility won’t quit gracefully

I’m having real problems with Canon EOS Utility. I’ve updated to absolutely the latest version {2.8.1} and still it often (but not always) hangs around like a ghost after a session using Live View to control my Canon 7D from my MacBook Pro. In these circumstances, it won’t quit properly. It won’t force quit either. In fact the only way I can stop it running is to force shutdown the Mac. Most unsatisfactory.

Is anyone else having the same problem?