Make sure that the serial number is still valid. If you licensed the component over a year ago, your subscription may have expired. In this case, you have two options:
Option 1 – Renew your subscription to get a new serial number.
If you choose this option, you will receive a new serial number that you can use to license the new components (from the installation utility or directly from the About Box).
The new subscription will entitle you to a full year of upgrades and to download the latest maintenance builds directly from http://prerelease.componentone.com/.
Option 2 – Continue to use the components you have.
Subscriptions expire, products do not. You can continue to use the components you received or downloaded while your subscription was valid.