Upgrade
While it's always possible to go on Cogniview's site to upgrade your PDF2XL CLI license, you can also upgrade from within the program itself.

The Upgrade Wizard, accessible from the Start menu, gives you several options:
- I want to purchase an upgrade: This option will open Cogniview's store in your internet browser, and display a list of available upgrades for your specific software version.
- I want to purchase an update: This option will open Cogniview's store in your internet browser, and display possible version updates that you can buy for your license.
- I bought an upgrade or update and have the Payment Code: This option should be used if you have already purchased an upgrade/ update, in order to apply it to this installation's license. Selecting this option will move on to the next screen.

In this screen you need to enter your payment code and email address.
The payment code is the one that belongs to the upgrade, and not the same one you used to activate PDF2XL CLI originally. You can find it in the purchase confirmation email that you received after buying the upgrade.
The email address is the one you provided when you purchased the upgrade.
Much like in the activation, if the computer is connected to the internet then PDF2XL CLI can connect to Cogniview's server and apply the upgrade automatically. If your computer is behind a firewall that blocks this kind of operation, you can also apply the upgrade via Cogniview's website.
In case none of the above methods worked, or your computer just isn't connected to the internet, you can apply the upgrade via email or fax.