This update is to comment on the document: Manually Update O365 Apps
But since I couldn't add any comments to the document I wanted to blog the quick second step needed with modern site. You will not see update link like the following in modern site mode
But you will see it like this in modern sites
So in modern sites, you cannot update the app as easily. The best way is to use the link in the bottom left corner of the site page to "Switch to classic mode". Then you can easily click the Update link and follow the steps from the original document.