How to update X431 IV on official website? There is the detail instruction:
1) Go to official website and create your account, then sign in.
2) Register the machine information, you can see the serial number and register password on password paper of the package.
3) Finally, you should go to download center, download the software just you need.
There is good news that X431 IV support one click update and update software one by one. It is also effective to use the transitional method to update the software if “one click update” fails.