Some people still haven’t heard of one of the most useful programs around for the most problem filled application in Final Cut Studio. Compressor Repair will go into your system, do what it does and either fix your QMaster, tell you if you simply need to re-install Compressor, or whatever it is to get your Compressor application working again.
Compressor is one huge reason I like Final Cut Studio. I am able to track multiple render times and now with Final Cut Studio 3, I can render out a project while editing another. How fantastic is that?