This is now built into WordPress 4.7+

Figured this might as well be pointed out so users of this plugin and/or people investigating this functionality know that this capability doesn’t require this plugin any longer. See documentation at https://make.www.ads-software.com/core/2016/11/03/post-type-templates-in-4-7/ (side note, this plugin can still be useful if you prefer post type template control to be surfaced via the site admin rather than within the template’s coding)

Thanks for the great plugin!