I have never seen a thing like that, and I'm "inside" Garmin for almost 15 years.
Anyway, since I've NEVER had issues due to Hiden files (I ALWAYS show and see anythings, anywhere and anyhow).
I dislike Windows limitation, they could be frustrating ...
Try to enable showing Hidden and System files in Explorer and go search for GPI files, thy should be exist.
Nothing comes by Nothing
:lol: