Renewing AVG license can be done in multiple ways, and then you can enter it on the avg.com/retail site. The process to install avg with license number from and activation at is valid for 1 to 2 years, depending on your subscription. Some users may have canceled the subscription option but want to continue the premium version of AVG antivirus. Or maybe the license has been expired, and you wish to renew it.
https://www.us-avg.com/avg-download/