Rhino files show a thumbnail on desktop instead of rhino icon

Thanks Nathan, I tried that on an individual folder on my desktop like you mentioned, but win 10 applied it to all my folders on the desk top, just like it does when I used the advanced system settings.

But this fix is problematic because then if you want to view thumbnails in a folder you cant.

I must be missing something here; other than Windows is so ridiculously over complicated.
They have added all these settings for this and that but after 20 years + of development, of their little genius “window” interface program, some of the basics are still screwed up in my opinin