I want to move a XLN product from my two registered computers to a third.
You will have to de-register one computer in favor of installing on a new computer. Here's how:
Run the Online Installer on the old computer.
Uncheck all boxes and let the Online Installer uninstall all products.
Log in to your user account and go to the My Account page.
Select Computers from the left side menu.
Remove the old computer you no longer use.
Run the XLN Online Installer on the new computer.