Upgrades are available after a product is off maintenance for more than a year. When a product is upgraded, all versions become available, and maintenance is extended 1 year into the future from the date of purchase.
Example: If maintenance expires on 1/1/2014 and is upgraded on 3/22/2015, the upgrade provides access to all currently released product versions (including those in the past), and extends maintenance one year into the future from 3/22/2015.
How to upgrade
A line item for the upgrade will appear in the Your Order section, and the license card will update with information about the upgrade's effect on the license.
When you are satisfied with the contents of the order, click Buy Now. You will be directed to an order form, and after the form is submitted, you can return to the account screen and find your freshly updated card.