It came with Butel when I purchase the Pro 106. I upgraded to the new firmware on Radio Shacks site but haven't heard anyone else going to uP App Ver: RU2.0
DSP AppVer:RF1.4
DSP VocVer:RF1.0
I use Don Starr's Win500 and would have sent you a file. If you decide to get it let me know by PM.
In the meantime maybe another has Butel in Nashville and can help you.
If that is still available that would be appreciated. Thanks. I haven't had any luck with Nashville P25 and haven't asked around to see what other's results are.