Problem uninstalling AVG free

Hi,
i have a problem uninstalling AVG free. When i try to uninstall the AVG program from the control panel Add remove utility I dont see AVG free in the list.
I also tried the Uninstallation Setup.exe file to uninstall the program but its asking me for the licence key. AVG is a free antivirus then why it is asking me for the licence key?

I have never got any problem installing or uninstalling AVG free whenever i used the program.
Have you tried removing it in Safe mode?

Tried this in safe mode but no luck. Still asking me the licence key.
I have also tried Ccleaner to delete it but got no solution.