Gary: I'm going from memory, but I think if you: 1. Put the Radian into Bootloader mode (power up with the signal pins of ports 5 and 6 shorted together. 2. Connect up the Radian via the USB cable. 3. Start up the Bootloader software (not the normal Radian software) and connect to the Radian, I *think* it displays the current version. I may be wrong and only displays the Radian serial number. Andy.