Here is a question Kim gets asked a lot.
“How do I upgrade my current AVG product with my newly purchased AVG License Number?”
Please note that it is not necessary to uninstall your current AVG product.
To upgrade your AVG product, simply:
Download the latest AVG 2011 installation file at www.avg.com/us-en/download (choose your edition and click on the link “Paid version.”)
Run the downloaded file and choose the add/remove components option.
Then, replace your current AVG License Number from the e-mail received after your upgrade was processed and paste it into the appropriate field during the installation.