The question is: Can it be done? In a massive example of l'esprit de l'escalier, I have come up with a much better title for my story that's been around for just over a year. *sigh*
If you go to "My Stories," find your story, and click the options at the top right of that story, you should see an "Edit Story" option. You can change the title, cover image, synopsis, etc. there.
Oh, the classic "staircase wit" strikes again! It’s never too late to rebrand, titles can totally evolve with your story. If the new one feels right, go for it! Just let your readers know so they don’t get confused. Fresh titles can breathe new life into older works!