This part here which you seem to have included in some of your source files;

"----------------------------------------
-- Outfitter Copyright 2006-2018 John Stephen
-- All rights reserved, unauthorized redistribution is prohibited
----------------------------------------"

Is in breach with the license that this code is released under, the MIT license, which clearly states that;

"Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software."

You cannot prohibit redistribution or even profiteering off of this addon under this license, I would urge you to follow your own license and remove what is in conflict.