If you never installed emplode onto that computer before, it won't show up in the Add/Remove screen and you don't need to worry about uninstalling it.

Remember that Emplode went through a couple of name changes during its development. I don't remember the exact names, but at one time it was "Rio Car Emplode" and another time it was "Rio Emplode" (I think that's what version 2.0 is), and maybe even just "Empeg Car" at some point in its history. So make sure to scroll carefully through the whole list of names in the Add/Remove screen.