There have been a few posts here about this recently...... Radio Shack has recently re-vamped it's entire web site, and the pages that contain the downloads for the PRO197 firmware (and others) appear to be no longer available at this time.
If for some reason you want to go back to an older version then use an older version. One of the versions they removed some the the 700mhz frequencies. Ronaldski if you want to copy the older versions then just help yourself.