Only to add to what Wayne has already said: The LR Settings folders has several subfolders that contain various classes of presets, and each in its own descriptively named folder. I'd take a moment and explore the Settings Folder and its subfolders so you can get a handle on what's going on. I've found it very helpful to customize a give Settings folder for a given catalog. For example, a nit of mine is that the Develop Adjustment Brushes can't be sub-categorized, and I don't like to see a million brushes I'm not going to use on a given project, so I place unused brushes in a "dummy folder". This makes those brush presets invisible to the program, but I can call them up later by just placing them in the "active" brush folder when I launch a different catalog.
These Settings files are, in the end, text files that are quite lightweight. So I keep the LR Settings folders and share them between catalogs. This has worked well for me for a few years now, and may or may not work for you.
John Caldwell