Remove application which has been deleted

I have an application which is still loading up when I connect the device via USB, even though I've deleted it!!

I went to finder>applications>then deleted it. Emptied the trash, restarted my mac.

When I plug the device in, the application loads (the application doesn't work, so I was trying to remove it, then download it again from the Leap Frog website).

How do I get rid of the application 100%, so I can try to download it again??