Forget Launch X431 V+ X431 PRO3 update login password?

One of our customer had problem when  trying to update Launch X431 V+ X431 PRO3 diagnostic system on Launch official wevsite, he has forgot the login password and failed to update.

Please provide your Launch X431 V+ S/N (serial number) to our tecnician and our engineer will find the pass for you(as long as you bought the device from us).