I want to make a suggestion with regards to improve UX workflow.
I suggest that put folder icon in each of torrent row in the listing in Transmission.
This way anyone can open the relevant folder or parent folder with file focused by clicking this icon.
This reduces confusion between the icons ("open folder to add torrent" and "open folder of downloaded file") as you told me earlier in forums.
This feature has been implemented in similar ways in many popular windows software like Firefox, uTorrent, Internet Explorer.