How to Remove Startup Items in OS El Capitan
MacBook Air, iOS 7.0.3
See if Kurt Lang's answer here will do the trick (it should):
how to stop Text Edit from starting when I start my Mac? I'm using OS 10.11.6
I don't use that particular application, but you also might want to check in its Preferences to see if anything there is checked to launch automatically.
How to Remove Startup Items in OS El Capitan