All plugin purchases come with included access to support and access to downloads for 12 months. After 12 months, you can renew access if you want to.
If you do not want to renew, then your existing plugin will not be de-installed or de-activated or changed in any other way. Of course, we cannot guarantee what level of compatibility it will have with future releases of WordPress or (if relevant) WooCommerce.
Posted in: Questions applying to all our commercial WordPress plugins