Gee don't want to seem like I'm repeating myself, but...
Where exactly are you looking? Presets should all be there under the plugin preset folder icon thingy and the librarian pulldown menu thingy (seriously the names of those UI items escape me). See the screenshot. If that's not the case for you speak up.
And you have, cough, read the manual?
https://resources.avid.com/SupportFi...g-in_Guide.pdf
And nobody can guess exactly where you are looking when you say things like "no *.tfx files under the Settings folder for this plugin" what is the *exact* filesystem path you are looking at? These factory default plugin settings are *not* under your usual per-user Documents/Pro Tools/Plug-In Settings/ (or equivalent on Windows) folder. On Windows I'm guessing they'll be under C:\Program Files\Common Files\Avid\Groovecell, but I'm not going to go and check,... they will just install fine and you should be able to find them.