Hi Dan,
The QuickTime CC track can only be read on a Mac, but if you have access to a Mac computer, you can download MacCaption and use the same CaptionMaker dongle to run MacCaption. Once imported, you can export the AAF for Avid closed captions, and it can be used on any Avid (Windows or Mac).
Best regards,
Jason Livingston
CPC Closed Captioning