Renewing Avast

Quick and easy question to answer: Where do I go to renew my Avast? It says that mine will be expiring in 20 days. I have the free version and I used to know, but for the life of me I cant remember.

Thanks ever so much,

~Manda

The avastUI, Maintenance, Registration, that interface should change to allow you to re-register.

https://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1073