I would like to be able to replace files in canvas.  Is there a way to replace a file with a new file without first deleting the old file, then adding the new file?  It seems as though the only things you can do with a file is: download, rename, move, delete, share to commons.  Why isn't there an edit button so that you can reload a different file?  I often make edits to my files and don't want 5 old copies of the file hanging around in my list of files.  There must be a less tedious way of doing this but I'm not sure how.