You can use the RadFileExplorer control, to list the folder with the uploaded files, allowing the users to download the file once it has been edited. The download logic you should implement if you choose to use this approach is demonstrated here: Filter files and download
Furthermore, you can implement a similar logic for sending the path to the currently edited file to a generic handler, so the file could be downloaded from a standard button. The handler from the above linked demo is attached to this message.
Hope this helps.
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