I found the Problem
Turns out I had both "Picoscope6" and "Picoscop6 Automotive" installed on the Win Vista PC.
The PATH in the command prompt environment was sending the command arguments to the Picoscope.exe in the Picoscope6 sub-directory first and it returned the errors and crashed.
I uninstalled the Non Automotive version and the Command Line works now.
Thank you for your time and trouble.