After purchasing the license, you will receive a set of license files and activation instructions. Delivery is made via email.
Our deployment license is perpetual — the product will never stop working if you deploy the license files correctly and work with versions released during the validity of your subscription period.
For example, you have licensed our product on February 1, 2017. Until February 1, 2018, you can download new versions of the licensed product from our website, and it will never stop working. However, if you try deploying a version released on February 15th, 2018 — it will not work with your existing license files unless you renew your subscription and receive the new license files from us.
Please make sure that you use the correct type of license files when shipping your product to customers or deploying it in production. Here's a detailed post that explains license types and redistribution guidelines