URC has a dealer finder. you can call some local ones and see if they will give you the software. There used to be some online dealers like Surf remote control and ? total remotes or something like that. You could try them.

There are 3 basic models.

MX780 - smaller screen, AA batteries
MX890 - similar to MX780 with slightly larger screen, docking station and rechargeable battery. Also, a pick up sensor so the screen comes on when you pick it up. The 780 has a light button on the side. More options in programming
MX990 - Larger screen, more screen buttons nicer keys. worth the extra $50 over the 890

Base stations-

MRF-260 - I rarely use except for very simpe installations and I have enough room to keep it away from the equipment. Has 4 IrR ports

MRF-350 - External antenna makes it worth the extra money, as well as 6 IR ports.

MRX-2 - if you want to use apps for your phone or tablet to control the system then this is the one you need.

Personally, I like the 990 with the 350 base station.