Has this happened to anyone using windows 10 1607?

I was using an ipack for about a week, everything was working as expected until today. The thumbnails reverted to the shitty old manila folders. I uninstalled, cleared cache and reinstalled several times and nothing is working, even tried other ipacks with the same results.

Any ideas as to why I can't get them to change, as I say everything was working fine for a week.