If you purchased a perpetual license, then a free 12-month maintenance subscription is included with your purchase. It will automatically renew for another 12 months after it expires, giving you the latest updates to World Creator. You can cancel it at any time through the Customer Portal.
After cancellation, you can renew it at any time, but the renewal cost will be 50% of the current World Creator price instead of 30% as it was before cancellation.