Close EFILive V8 Scan and Tune.
Connect FlashScan to your PC.
Open V8 Scan and Tune.
Select [F7: VIN Licenses]
Select [F3: VINs]
Select Copy Serial and Auth Code, and hit the blue Purchase Activation Codes option.
I've been through the menus; when you open V8 S&T software and select [F2: Scan], there is no [F10] option.
Cheers
Cindy