Normally when you’ve used trial version of AVG Antivirus or Internet Security and decided not to purchase when it expires then one way to get back to AVG free version without uninstalling paid version and reinstalling free is to try to proceed with uninstall of AVG trial which offers option to convert to AVG free, without this hassle AVG is offering AVG Downgrader tool which turns AVG trial license to the free version.
AVG Downgrader
Using AVG Downgrader is simple. Download the file from AVG support tools and diagnostic utilities page and run it, accept to the license agreement and click “continue” to proceed, on next step where AVG Trial will be downgraded to free version and computer will be automatically restarted.
After restart, AVG free version will be running fine without any issues and protects your computer.