Hi @Carter41,

I don't know of any built-in way to make a change like that to every assignment across multiple courses.  If you have someone with a computer science background, a script could be created using the Canvas API, but with only 80 assignments (yes, I say *only* 80 because I'm at an institution with 1300 courses running every term with sometimes over 50 assignments in each) I'd probably say just clicking through them would be faster than having someone write a script.  It's mind-numbing work, but I feel like it could be done in under an hour.

Sorry I didn't have better news for you on this.

-Chris