Program ecu with techstream

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Hello everyone, this time I need everyone's help to solve a problem, when the techstream is connected, in custom functions you can activate or deactivate important functions in our cars. as an example: raising and lowering the windows from the key, deactivation time of the headlights, acoustic belt buzzer, among many settings. Now my meadow cannot be programmed and none of it is working, I would like to know if someone knows how to do a factory reset so that they can work again.