De-authorizing a Live installation

There isn't a way to de-authorize Live, you would simply need to uninstall the program from any old machines.

Uninstall Live from your PC

Uninstall Live from your Mac

Once completed, you can download Live from your user account to install onto a new computer, or a recently reformatted computer. 

If you receive an error message that you have run out of unlocks during a reinstallation, you can request more