After purchasing GPS Tuner you will get your Serial Number by e-mail. Serial Number has special alpha-numeric format like: XXXXXXXX-XXXXXXXX
You are able to regiter yourself in GPS Share System with the help of your Serial Number.
Custom Key
GPS Tuner v4.2 users has to enter their Custom Key also, becuase the earlier version of GPS Tuner sends position data based on Custom Key, while new v5.0 uses your login/password to send and receive data.
