Ok so heres my problem, I want to change group names but I have players who are donators. So i'm trying to change the name of the donator group and the group that the players are in. For example, our donator group used to be called "Donator" but we want to change it to something else (not just the prefix but the full group). But if i change donator to "Example" how would i change everyone in the "donator" group to the new "Example" group?
I think if you scroll down in your permissions.yml file you'll see UUIDs and it'll show what group they're in. If that's the case then do CTRL + F and Find/Replace Donator with Example and that should change all players to new group that were in the old group. I'd also suggest backing up your current permissions.yml file first.
@friendjt You can even open up your permissions.yml with Wordpad and do as I said. There will be a button that says Replace All as @timtower said.