So this folder is where my filters are !!!!
Directory layout for my Windows XP.
This is not necessarily the way it "should" be, but its been working for me.
I've had GIMP for a few years, maybe 5?, and as I've upgraded over the years, I'm sure the directory is far from optimum, but (until recently) its been working well.
This is a screen shot from a cloned backup - which I will be copying to replace my directory that I've gotten all messed up.
This is just a template for me - in case I have trouble getting things back in shape.