A support license key can be renewed at a discounted rate. You will be notified via an email, sent to the email address supplied at the time of purchase, of an expiring support license key one month before the support license key expires.
The renewal fee would be the current price of the item at the date of renewal minus 20%.
As an example if you were renewing it today, the fee would be $15.99 instead of $19.99.