i have been trying to uninstall free avast security (14.6) from my mac (10.11.6) but it won’t work. when i click uninstall i get an error message that says uninstall cannot be opened because of a problem (details are way too long to post). when i try to move avast to trash i cannot because finder says avast is open. when i try to quit avast and move it to trash finder says it’s still open. any help to get rid of avast is greatly appreciated.