I complained as well and they locked my discussion. I'm switching back to my HD Pro to use the Desktop software in hopes they can't get to that as long as I never upgrade. As for the 500, 350 and I imagine M1, you are screwed since they pushed those out of the Desktop programs use.
I will never buy a new product from them again. Just like Tivo, Slingbox will become obsolete with the new offerings of cable. Don't switch to Dish Network either. They are the ones who bought and destroyed these great boxes.