Antivirus Uninstall

In reading in this community I understand that an antivirus program is not needed on a mac. I have a 2016 MacBook pro with AVG installed. the free version, it is always giving me notices to upgrade to the paid version, so I went to uninstall it. It does not let me uninstall like I do all other applications by dragging to the trash because it says it's open. So I try to close it, I can't see a way to do this, but there is an AVG uninstall application. Will this be all I need to do? I am asking because this is so different than all other applications when I need to remove them.