@zAndrewi Make sure AddonPeds Editor.exe is in your root folder with the GTA5.exe. Make sure you right click and run as Administrator. I believe the mod comes with a demo ped installed, is that working in the game? If its just not adding new peds, but otherwise working in game, you most likely just need to double check that the scrips/apps are in the correct folder and you MUST run it as administrator.