Your Key ID is used by Mechanical Simulation to determine your license type
and maintenance status. You will be asked for the Key ID when logging
into the Users section of the website or when requesting technical support.
Your KEY ID is printed on the dongle.
From the browser (carsim.exe, bikesim.exe, or trucksim.exe)
use the Tools->License
item to bring up a window showing your Key ID and other information.
Click the picture for a full size view of the license settings,
including the Key ID.