This is an odd problem. For some reason Avid FX v6.3 is (apparently) crashing as it loads. If you apply, say, a transition effect from within MC and try to open the FX editor, you'll see the workspace for a moment before Avid FX closes, and if you're in Media Composer, that will hang as well. If you try and open the Avid FX Engine from the desktop, it will behave the same, crashing after a moment of workspace.
I've tried re-installing with no luck. I've also tried going back to v6.2, but it displayed the same behavior.
Anyone have any ideas?