I don’t know if there is a documentation. What i know is that the settings directory is not created while the installation of GD.
And you can put the directory created by your “hand” into the game directory or your user path.
Look at the point “Guide: “How To Use Preset-Files” that were generated with the tool by me as Zip.”
Here in this link from the color coding tool.
https://forums.crateentertainment.com/t/tool-rainbow-filter-item-highlighting/42765?u=tean101
thats all I know…
May be the OP can give us more information…