Installing AVG Internet Security on more than one computer

Hello Pam,
We regret for the inconvenience caused. Please run AVG Clear tool and AVG Remover tool to remove AVG traces using the below instructions.
1 Use the link https://share.avg.com/steam/PSP/AVG2017/AVG_Clear.exe to run the AVG Clear tool.
2 Open the AVG Clear tool, click Yes in the User Account control dialog.
3 Click No in the Windows safe mode dialog.
4 Select the installed version of AVG and also check the box 'Uninstall AVG Zen'. Then click Uninstall, and Restart computer.
5 Download the AVG remover tool please click on this link:
http://aa-download.avg.com/filedir/util/AVG_Remover.exe
6 Run the downloaded tool and follow the instructions displayed on your screen.
7 Your computer will be restarted automatically.
After reboot, Open C drive and delete "AVG Remover" folder, also delete "AVG" folder in "Program files (x86)" in C Drive.
Use the link to install AVG Internet Security: http://avgread.me/1DXPL5z .
Thank you.

Hello Pam,
We regret for the inconvenience caused. Please run AVG Clear tool and AVG Remover tool to remove AVG traces using the below instructions.
1 Use the link https://share.avg.com/steam/PSP/AVG2017/AVG_Clear.exe to run the AVG Clear tool.
2 Open the AVG Clear tool, click Yes in the User Account control dialog.
3 Click No in the Windows safe mode dialog.
4 Select the installed version of AVG and also check the box 'Uninstall AVG Zen'. Then click Uninstall, and Restart computer.
5 Download the AVG remover tool please click on this link:
http://aa-download.avg.com/filedir/util/AVG_Remover.exe
6 Run the downloaded tool and follow the instructions displayed on your screen.
7 Your computer will be restarted automatically.
After reboot, Open C drive and delete "AVG Remover" folder, also delete "AVG" folder in "Program files (x86)" in C Drive.
Use the link to install AVG Internet Security: http://avgread.me/1DXPL5z .
Thank you.

I have paid for AVG Internet Security on 4 computers, and installed successfully on three of these.  The fourth had the trial version installed.  I have downloaded and tried to install the paid version on this fourth machine but it will not overwrite the trial version.  I have tried to uninstall the trial version but it will not go away.  The computer runs Windows 7 and the trial version runs out at the end of May.