Follow the link below to Uniden's web site. Then click the "support" button under the BC246TUASD picture. Then click "software" and the download is listed. I believe it's Pre Release 3 that is offered. The official complete version hasn't come out yet.
Hope this helps! I've got a 246T myself and use the software. While lacking some of the features that Butel's future offering will have, it sure makes it easy to enter systems and saves on getting carpal tunnel from programming by hand.