Later versions of V8 have that button available.
If it is already running, you can open the EFILive Control Panel window by clicking on the FlashScan icon in the System Tray near the clock on the Task Bar.
If it is not already running, you can start it by either starting EFILive V8 Scan and Tune or by starting the control Panel directly from the Start menu.
If you start the Control Panel directly from the Start menu then you will also need to manually close it when you're done by right-clicking on the FlashScan icon in the System Tray and selecting Exit.
Regards
Paul