You can upgrade your subscription to the next available edition from the marketplace.
For the free Trial edition, Hitachi Marketplace sends an email as a reminder when the free trial is close to the expiration date. The email includes information on the expiration date, the number of days left before the expiration, and links to upgrade to the next available subscription.
To upgrade, click Update Edition or the suggested link in the mail. You are directed to the marketplace, where you can upgrade to the next available edition.