Unfortunately they don't have utilities that can update their HDMI Detective. I tried using PowerStrip to do this, but I got an error. I mentioned this to Gefen, and I have sent my unit back, and they will upgrade the firmware so that PowerStrip will work.
I've also found another product, in case anyone wants a simpler method of doing this. DR HDMI allows you to read from a source, and also has a utility where you can read/edit/write to the device. Works great.