Days ago, I bought KESS V2 from China. New to this, I cannot use it well. But luckily, with the help of the nice customer service, all works out. Post here for sharing.
There is only 9 tokens left. Later, I used the ways provided by the customer service， but the system prompted the following message. (unhandled exception has occurred in your application. If you click Continue, the application will ignore this error and attempt to continue. If you click Quit, the application will close immediately.)
The computer lacks patch or my computer do not supports fix/restoring, that the fix software cannot run well.
Install delphi 2014.2. Just install car software. Then use the the fix software with tokens.
Note: it is not necessary to install delphi in every laptop. But in some laptop, you have to install delphi to run the fix software.
Here is the video guide for Kess V2 tokens rest from the seller:
And after restoring the program, KESS V2 turned version 2.08. (it should be version 2.4)
The tokens for restoring the program should belong to the seller. When finished the fix, any version I want can be used.
Hope this help those with Kess V2 out also.