Help! I downloaded Dropbox Dash on my Mac and started it up. Now I can't get rid of it. Even after quitting Dropbox itself and restarting with Dropbox off, Dash still starts automatically on startup. I don't see a way to quit it or prevent it from starting automatically on startup. I even went to my Dropbox account page and disconnected Dash from Dropbox, but that made no difference. How do I quit Dash, prevent it from starting on restart, and delete the Dash app?