: Open that file in the IMMO Universal Decoding software.

No software works alone. For Immo Universal Decoding 35, you need:

: Save the modified file and write it back to the ECU chip using the programmer. Important Considerations

This is a critical technical feature. The user does not plug the laptop into the car directly. Instead:

: Permanently deletes the immobilizer code so the car can start without a programmed key

Beyond simply turning the system off, it can sometimes repair corrupted IMMO data in the ECU or help synchronize the ECU with the dashboard/immobilizer box.