You need Xhorse Keytool Upgrade Kit which is Installed on your PC with the Internet connection online.
>>connect white USB cable provided on Mini OBD Dongle to PC USB. Just follow on pop-up screen instruction. This stage do not switch ON your VVDI Key Tool Max.
The upgrade kit will Auto Detect your device and update to the next version.
IMPORTANT update firmware version in sequence do not jump to the latest Version number.
Do it step by step until you get the latest version.
Finished>>>Switch on your Key Tool Max and pair (Bluetooth) with Mini OBD Tool, and you get screen pop-up menu on Key Tool Max.
You can connect KEY TOOL MAX to MINI OBD TOOL in 3 methods:
1) USB TYPE-C Cable