Atomic software products require a one-time payment. You will be able to use them as long as you wish, and they will never expire.
However, the Internet and technologies change, and we keep up with these changes by releasing new versions of our software. You'll receive free updates to your products within a year of purchase. Thereafter, take advantage of another year of free updates with a 40% discount.
To update your software, login to the member area and click "Renew with 40% Off " link.