Making a change in multiple emails

My Mautic version is: 3.3.2.
My PHP version is: 7.4.3.

Hi there, I need to change something in the footer of my emails. The problem is….there are more than 100 emails. I’m aware of the twig template plugin, but we didn’t used it back then. Is there an easy way to change all these emails at once, or do I have to change them one by one?