It should be noted that FL Studio doesn’t officially authorize these types of software FL Skinner – Software like FL Skinner can be used to download and organize FL Studio Skins.These themes come with adjustable parameters like hue, brightness, and saturation. Changing The Theme in Settings Menu – Some stock themes are included in FL Studios 21’s user settings.These methods apply to PC and Mac users and can be done at home with little to no outside assistance. There are three primary methods to changing your FL Studio Skin.