Useful guide and files! A bit questionable why this kind of thing wasn't integrated in the editor itself, but this works for me.
I'm a bit confused about the Mods folder in the Editor folder. For me, the Mods folder is just in the main Data directory, not the Editor folder (though, admittedly, I did make the Mods folder there a while back for Scales), and all the data seems to go there fine. Might that be creating issues for me?
Either way, IMO, it'd probably be easier if you just had people make a level in their mod so the Mods folder is made instead of manually making it.
This is more a bug that ought to be solved, but perhaps you could include the icons in your template so you can view them in editor.
Also, these are actual, official tutorials, right? People might trust your authority more (and actually appreciate the official support) if you had a moderator status or something. Just a recommendation if you're actually working for Larian.