If your asking on how to do a license swap between machines just go into the GUI of Scanner, click on "Settings" then click on "Scanner Settings" then click the tab on the right "License". From there "View License Details" and click deactivate. Make sure you have your license key email to save some time or at least copy/paste that license key in a safe place.
What this does is removed that specific license from being tied to that specific hardware. Reinstall whatever version of Scanner on your new hardware and your license will be able to be activated on the new machine.