Here is a quick and dirty little uninstall script for the GFI Max Agent.

setlocal enableDelayedExpansion
Echo Off
echo !DATE!_!TIME!
echo Uninstalling agent...
"%SYSTEMDRIVE%\Program Files\Advanced Monitoring Agent\unins000.exe" /SILENT 
"%SYSTEMDRIVE%\Program Files (x86)\Advanced Monitoring Agent\unins000.exe" /SILENT 
"%SYSTEMDRIVE%\Program Files\Advanced Monitoring Agent GP\unins000.exe" /SILENT 
"%SYSTEMDRIVE%\Program Files (x86)\Advanced Monitoring Agent GP\unins000.exe" /SILENT 
echo !DATE!_!TIME!
echo Uninstall complete!