You need to download Sony's XDCAM Browser.
I can't get the plug-in to work with our PMW-EX1R cameras (running fw 1.20) - so the XDCAM Browser seems the only solution.. :-/
Here, the camera card simply shows up as a volume, with a browsable structure, unusable. Or, very frustrating, as you have to go dig out each mp4 file in it's own folders.. I sure don't hope that is what they mean with 'plugin support'!