Unfortunately, the UASD software isn't free if you want the full functionality of the software. It's pay for play.
ARC246 from Butel Software (
www.butelsoftware.com) is another OUTSTANDING piece of software for controlling and programming the 246T. I just purchased it myself ($39.95) and it's worth every single cent.
The only thing you can do at this point is try the demo/trial versions of both software packages and decide which you find more appealing and useful to you.
There is one freeware piece of software I've seen for the 246T but compared to ARC246 (I really didn't like the UASD software when I first tried it after getting my 246T), it's not even in the same ballpark.
If you want a link to it, I'll locate it but really you'd probably be far better off using ARC246 or UASD.
Hope this helps,
Paul