I don't remember installing opera at all. But when I was opening a torrent file, opera launched itself. When I look inside of my applications folder, there is no opera app and the only instance of its existance is in the library application support folder. [When I open the folder and click on the about opera file, it will also launch opera.] How do I get rid of this. Not that I don't like opera, but it feels a bit odd. AppZapper does not detect it at all if that helps.