found it in FAQ - you forgot to RTFM
Membership and Renewing your Account
Membership to ZoneGFX is free and while you are asked to renew your account once per year, this is a simple process and your account details including your points total will remain unaffected. There are no fees involved and you will not be asked for any details after registration.
To renew your membership once you have received an email from ZoneGFX simply click on the following at the top of any page: Community>Membership Levels>Renew, and that’s it! All done for another year!