A V2 AP can overwrite an previous AccessPORT installation. So you could find another V2 AP to flash the car, then uninstall it to revert your ECU to stock. Or, you could send the ECU to us to revert the ECU to stock. There will be some downtime and a small fee, but give us a call at 866-922-3059 and we'll get you taken care of!
Ian