A license for a PiXYZ product is purchased for one year (rental), and is not automatically renewed (we do not store credit card information).
To renew a license, simply connect to your account, go to the LICENSE MANAGEMENT tab. In the Licenses Table, in the row of the license you wish to renew, you will find a “Renew” button. If you click on it, it will automatically add a Renewal for this license in the Cart of the Store. At the end of the purchasing process, the license duration will be extended for one more year (additionally to the current remaining days).
You can renew a license even after its end of validity. Just remember that the renewed license will be bound to the same computer on which the previous license was installed on.