You must own a copy of RPG maker MV to use those specific sprite sheets because they are edits from resources that come within RPG Maker.
Hi there the content of the pack actually can be used in any engine. There used to be a 4 directional sprite sheet that was an edit of the RPGmaker base sprites but I removed them long ago and replaced them with my original 8 Directional ones. There's no restrictions on engines now. They are simply formatted for RPG Maker.