Hmm, no idea. If you have already deleted the 1.4 version, entire NCYawMod folder, just drag the folder from the zip to the mods folder and it should already be on the loaded mods list (as 1.5). Make sure that the game is not running as I guess that could be holding a file lock on mod.info not allowing it to be deleted and/or updated. I deleted everything and started from scratch and still can't get it to show up in the mod launcher. It's weird because I did everything exactly the same as when I first installed it. Oh well, gonna keep tryin I suppose.