You can retrieve your serial number on your FastSpring Order Account Page. Use your e-mail address associated with your license number to login.
You can list the computers associated with your license as well as the basic license info on your License Account page.
If you are no longer need your license on a computer - e.g. you want to move your license to a new computer - you should deactivate it. The computer needs to be connected to the internet - just like it needed the internet access for activation.
The Deactivate Online command is available from the Registration... panel you can find in the Mitti menu.
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