Where to undo "don’t show this message again"?

I often make the misstake of accidentally checking the "don't show this message again" checkbox when using tab and spacebar to navigate. Since I'm asking to never see the message again, undoing that action is usually hard. Sometimes, it's hidden away under settings somewhere, and sometimes it's nowhere to be found.

What's a good way to allow users to undo "don't show this again" actions?