Coding Immobiliser Keys With Techstream Version 12 Landcruiser 100 2000 1HD-FTE

[Indie]

Hi People, I have managed to get Techstream working and now would like to register a new immobiliser key to the car. Ive read that if there are two many keys already registered to the car the ecu will not allow further keys to be registered. I have an option after selecting immobiliser from the main menu in Techstream to delete registered keys, will this delete all but the master key that im using ? Obviously concerned that it may delete all my keys. Can someone tell me if its safe to click the delete keys option and what happens next please ..?? Thankyou.