Aperture 3.6 isn't working (Yosemite 10.10.4)

Hey guys! I usually don't post here, but this one is really ******* me off. Got a new MacBook Pro 15 last week and Im unable to open Aperture. I'm on Version 3.6. When I want to open Aperture there is just this window, which tells me aperture can't be opened because of a problem. Do you have any idea? Greets from Germany!