Can't change AVG Pro into AVG internet free

I have difficulty of changing from AVG internet Pro into AVG internet free even I uninstall also cannot, I need help also license key cannot validated because I using crack version I need help

Hello Ho,
We apologize for the inconvenience caused.
As we understand you want to downgrade your AVG Product to AVG free, is that right? If so, we would request you to run AVG remover tool to completely remove AVG pro and then re install AVG free.  
Please  click this link http://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.
To reinstall please follow the article http://avgclick.me/InstallFree .
Please feel free to get back to us for further assistance.
Thank you.