Changing Centers

Sorry if I mess anything up. I’m new to Blender and this forum.

I was making an animation and did some editing on my model. Without realizing, I changed the origins of all the parts. When I tried to play the animation, the placements of all the pieces got messed up. Is there a way to fix it or will I have to load my backup and make all the changes again?

Does Undo work?
Otherwise you could append the objects from the other file into the messed up scene, then in the Properties / Data section swap the screwed up mesh data blocks with the good ones.