Hi,
After purchasing an extension, you can install and use it on unlimited websites / domains that you have. However, with each website / domain that you need our premium support, you must purchase a valid license of extension for it.
A year after the purchase of an extension, you can still use the extension without restrictions, forever. You can keep installing the latest version that you have downloaded from our website, on any website. But you will no longer be able to get extension updates or premium support unless you renew your subscription.
Thanks
Dam