Imported Footprint Disappeared (due to KiCad update, perhaps?)

Not that I can see. First, I’m referencing this thread, which I brought up earlier. Second is your post, above, where you’ve said:

On macOS, I have ~/Library/Preferences/kicad. According to that thread and to your answer, that is the only location I have to worry about for KiCad files (other than my personal libraries and projects), but I’ve found another directory, one I did not make, ~/Documents/kicad, so KiCad made it. I don’t remember how my edited worksheet got in there. I think it was because when I tried to edit it, that was the default save location, I saw the directory was “templates,” and thought, “Sounds like where KiCad wants it.” Otherwise all the directories in it are empty (except, maybe, for empty subdirectories).

So this is a 2nd directory we haven’t discussed that KiCad created.

I think it’s explained in this other reply:

But I don’t know what’s going on and if that’s just, as stated, a suggested directory, or if something else is going on there. I don’t know where it is in Windows, but we have the locations for macOS and Linux specified here. If it’s just a suggested directory, then there’s no issue, but I just want to be clear if it is only suggested or if KiCad actually uses it for anything at all.