How do I update or re-import animation in Unity?

Hi, I'm a complete beginner trying to learn Unity. I've made changes to some of my animations. How do I re-import or update animations after I've it's been imported into Unity? I can't seem to find it anywhere. I've been told to just delete the file and drag it in again, but that sounds like a silly workflow. If I right-click on the animation, there's a "Reimport" option, but it doesn't seem to do anything.

I want to just re-import animation so all the events I added won't get blown away. Sounds like it should be simple.

Any help would be greatly appreciated!