Did you perhaps take a break from your membership, or accidentally allow your membership to expire? There's no need to worry about your account, as we keep it safe and sound for you in the event that you choose to come back!
If you still remember your login credentials, simply login to your existing account (no shown as "Free"), navigate to the "My Account" page, and scroll down to the "Subscriptions" area. Here you may either select "Go Premium," or "Try Free Trial" (if your account qualifies), to update your billing information and resume the premium benefits of your membership.
GoComics Support Team