Sometimes I screw up on a fill in the blank key, or I need to add a correct answer after students start taking the quiz. I can't find a way to get the changes to apply to a quiz in progress, or to regrade after the students have all submitted, without going through and hand grading one by one.

Since the point of using a key is not to have to hand grade one by one, is there a way to get a fill in the blank quiz key to regrade, using updated criteria? It seems there should be, and I found a five-year-old question about this where the coach said this very thing was going to be voted on soon. But if this actually happened in 2015, I can't find an obvious way to do it in 2020