Any .app file I attempt to download and launch (IE: robocraft steam game through steam and in file, wine, minecraft, etc..) dissapears after I open it. With wine, I install it, and when I attempt to open it in applications the file just.. dissapears, as if I had deleted it, but it's not in the trash can. With the others, it'll ask for an admin password, I'll type that in, and in the bar at the bottom of my screen I'll see the icon for it pop up, it sits there for a moment then... both it and the .app file for it just "dissapear".