I'm a new owner of a Pro 197 also and I found only three software options available, none of them are free.
ARC500 or ARC500 Pro
All of the can be found on the wiki page: Object Oriented Scanner Software
Object Oriented Scanner Software - The RadioReference Wiki
The Arc500 PRo is offered as a one week demo for the Pro197, it was part of the software package with the scanner. I use Butel software for the BCT15x and BCD996xt, so it will likely be my choice.
Good Luck and enjoy.