This screenshot either does not contain copyright-eligible parts or visuals of copyrighted software, or the author has released it under a free license (which should be indicated beneath this notice), and as such follows the licensing guidelines for screenshots of Wikimedia Commons. You may use it freely according to its particular license. Free software license:

Ovo djelo je slobodan softver; možete ga redistribuirati i / ili mijenjati pod uvjetima GNU Opće javne licencije kako ju je objavila Free Software Foundation; inačica 2 licencije, ili bilo koje kasnije verzije. Ovaj rad se distribuira u nadi da će biti koristan, no bez ikakvih jamstava, te ne sadrži garanciju prodaje ili prikladnosti za određenu svrhu. Pogledajte inačicu 2 i inačicu 3 GNU Opće javne licencije za više detalja.http://www.gnu.org/licenses/gpl.htmlGPLGNU General Public Licensetruetrue

Note: if the screenshot shows any work that is not a direct result of the program code itself, such as a text or graphics that are not part of the program, the license for that work must be indicated separately.