Update file contents without having to remove the file and re-upload it

Sometimes I would like to update a file in the Documents App (e.g. pdf), but when I upload  it, Workspace says "file name already exists", so I have to remove the file and upload it again.

Not only it's tedious, but also if I had links for the external access in SharePoint, they are all gone if I re-upload, and everyone who might be using it via link now can't.

It would be great to provide an option to update a file in such a case.