Look here: How to combine Xhorsevvdi2 and key tool

Need to open the VVDI2 software and click on the transponder programmer option.
Then along top menu bar, click ‘points system’ and you will find an option to enter your key tool serial number and bind the two devices while both connected to the computer.
This means any bonus points you earn in key tool will be transferred to the VVDI2, and have all points in one place.