To upgrade the software on the Satworks 3618 I had to go into the accessory list, then system update and change the transfer type to read "PC to IRD." Look for something like this on your receiver, I am sure that all receivers would have something to the same effect to upgrade.
I too had the same problem, flashed the software over and over and over and it always went back to the old one. When I stumbled onto the above, and changed it, I got the upgrade the first time.