I use win96 by Don Starr. You must set the Custom Trunking Table in the right top corner to be able to track STARS.
I get the Chesapeake area by Setting Mot 3600 CC and Mot 9600 CC to Custom table with Base Frequency to 156.000, Offset to 16384, and Step Size kHz to 2.50. (The software will not set these, you must do it.)
I think you can get a trial version on line at starsoft.com