Scroll down to the "Vivacity" section. You will see:
If you are setting up a new system, remember: the link is only as strong as the network it sits on. Secure your connection, verify your credentials, and you’ll have a smooth, high-performance experience. topaz vivacity key link
Topaz Labs maintains a for customers who already own a license. This is the only safe "key link" you should use. Scroll down to the "Vivacity" section