Here's a re-post of the solution that worked for me. Been months now and Snip and Sketch still works after various Win10 updates. No re-install. No jumpin' through hoops, waving chicken bones, etc.
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I stumbled upon a fix for the "snip" problem I was having.
I wanted to change a notification for an unrelated app in settings. I happened to notice that notifications were turned off for Snip & Sketch (pretty sure I didn't do this), but maybe latest update did?? Anyways I turned notifications on for snip & sketch and "snip" worked for me again.
Hope this might help others.