Our billing system uses "Subscription" feature for the auto-renewal of licenses. This saves you from the trouble of manually renewing your PowerPack Elements license.
First of all, make sure you are logged in to your account or else simply log in. Click on My Account button at the top right corner.
Look for the Subscription Box on the My Account page. Look for the Cancel link at the far right end of the box. Click on Cancel link to cancel auto renewal.
You have successfully canceled the auto-renewal of the License Key on your account.
You can continue to use PowerPack Elements add-on till your License is active and renew it manually to receive future updates and support.