Question: Could you tell me the difference between master and slave version, simply.
Answer: If you have master version you can work directly on the program you have write on the vehicle (tunning, egr off, ….) and rewrite after diectly.
If you are a slave version (who depend of a master (who do modificated), you read the program (cripted by genius), you send it to the master, he do what you whant (money paid) and he re-sent to you to write in the ecu machine.It is expensive for the slave version user who depend of a master.
Kess V2 Firmware V4.036 Master Version ECU Programmer with Unlimited Tokens: