I improved my app after publishing it. Can I change what I initially uploaded?

Yes, you can update the live app to reflect your latest improvements. To do so, go to your app Settings and select Actions > Update. Then, reupload all your app files (even those that are unchanged!). When the newly created revision is running, your app URL will have the latest and greatest!

Learn more about app updates and revisions: https://docs.plotly.com/cloud/update/