Hi,
if USB is green, most probably only the key file is not present or not current. Please download again from vstabi.info/devices, and make sure it's named keys.sto (no other characters, numbers), and move it to the program directory (usually c:\program files\VBarControl).
The key file is like a key chain and always contains all the units registered at the time of the download.
Kind regards
Eddi
Born to fly ...
forced to work.