Console displays text "press(naci)" at the end of program

[Desson]

It's just something like that:
http://scr.hu/0vcf/704xa

Why it's happening?
"Naci" is cutted off text from "Nacisnij dowolny klawisz aby kontynuować" which means "Press an key to continue.."

My .pro file looks like that
http://scr.hu/0vcf/sxi6w

I don't want this text to display anymore, it's very annoying :<
Please help.