Select the Resources tool from the Tool Menu of your site.
To upload a new version of a file, to the right of the file to replace, from the Actions drop-down menu, select Upload New Version.
This displays the Upload New Version page.
Click Browse to locate and select the file on your computer.
This returns the display to the Upload New Version page with the name of the new file.
This replaces the original file with the new revised file.
Note: The display name for the new file remains the same as the original file.
Sep 04, 2014