Thanks Rehaz.. I got it taken care of, but I'm not sure how. I finally found the option for the added Enter command (man some of this stuff is buried and tricky to get to!) and it was set to "yes". I can't remember what I did next, but I was then prompted to point the DTV remote at the H1 and press Enter, which I did and it recognized, then I saved the changes, updated the remote, and voila, it works perfectly now.

The config software is definitely a bit cumbersome and I'd imagine a nightmare for the kind of people that vapor lock as soon as their PC has any sort of problem. Such is the price of configuring to control 1000's of devices, I suppose.