AVG Internet Security for 3 computers problem installing on 3rd computer

AVG Protection
2

Hello Kathleen,
While verifying your account you have AVG Internet security as your active subscription.
We would request you to run AVG remover tool to completely remove AVG and then re install it.  
Please  click this link http://aa-download.avg.com/filedir/util/AVG_Remover.exe to download and run the AVG Remover tool.
1. Please select the AVG products which are shown in the remover tool window and then start removal process.
2. After the remover tool process is successfully finished, restart your computer.
3. After the restart,  manually delete the AVG Remover folder in the C drive of My computer.
4. Once uninstalled please follow the instructions on the article : http://avgclick.me/InstallAV to reinstall your AVG program.
Please feel free to get back to us for further assistance.
Thank you.

3

Hello Kathleen,
While verifying your account you have AVG Internet security as your active subscription.
We would request you to run AVG remover tool to completely remove AVG and then re install it.  
Please  click this link http://aa-download.avg.com/filedir/util/AVG_Remover.exe to download and run the AVG Remover tool.
1. Please select the AVG products which are shown in the remover tool window and then start removal process.
2. After the remover tool process is successfully finished, restart your computer.
3. After the restart,  manually delete the AVG Remover folder in the C drive of My computer.
4. Once uninstalled please follow the instructions on the article : http://avgclick.me/InstallAV to reinstall your AVG program.
Please feel free to get back to us for further assistance.
Thank you.

1

Sep 3 2015 renewed my AVG Internet Security for 2 yrs for 3 computers.  Installed it on two laptops but now also have a new desktop I want to install it on.  Don't know how to go about doing it.  Can anyone help me?  I tried installing a free version, thinking I could change it to the subscription one, but that isn't working.  I can only install a free Zen AVG product which I don't want and it doesn't seem to give me a way to change it to the subscription program I paid for and want to install.