AVG Internet Security reactivation after reinstalation

Hello Valentina,
Thank you for contacting us with your concerns. It seems you have installed a trial version of AVG Multidevice program which does not require a license number to activate.
Please follow the steps in this article http://support.avg.com/SupportArticleView?urlname=Uninstall-AVG-Zen to remove the multidevice program and follow the steps below to download your AVG Internet Security.
Visit this webpage http://www.avg.com/us-en/download.prd-isc to download the installation file for AVG Internet Security.
Run the downloaded file to start the installation process.
Follow the instructions on your screen.
When prompted, enter your AVG license number. The license number is sent automatically to your e-mail once purchased.
Complete the installation and restart your computer.
Please, feel free to let us know if you require any further assistance. Thank you.

Some time ago, my computer got almost hacked. To remove the problem reinstalation of Windows was required but during this process the full version of AVG Internet Security (like, the whole program) got uninstalled. I downloaded the free version and upgraded it with the valid licence key I had. That something in my computer went wrong again and I needed to reinstall my Windows all over again so I lost the AVG product again. I downloaded the free version and want to upgrade it like last time but there is no longer such option. All ai says is buy a licence but I don't need to since I already have a valid one. There is no "reactivate" option nor can I see an "upgrade" option. 

Hello Valentina,
Thank you for contacting us with your concerns. It seems you have installed a trial version of AVG Multidevice program which does not require a license number to activate.
Please follow the steps in this article http://support.avg.com/SupportArticleView?urlname=Uninstall-AVG-Zen to remove the multidevice program and follow the steps below to download your AVG Internet Security.
Visit this webpage http://www.avg.com/us-en/download.prd-isc to download the installation file for AVG Internet Security.
Run the downloaded file to start the installation process.
Follow the instructions on your screen.
When prompted, enter your AVG license number. The license number is sent automatically to your e-mail once purchased.
Complete the installation and restart your computer.
Please, feel free to let us know if you require any further assistance. Thank you.