I already replied to a realy old post with this but i did not know that it would not move up to the latest post. sorry if repost.

What i specifically want is to double click on the tray icon and for that to go to the next image.

This could be achieved by allowing mouse buttons on the hotkeys options page. Alternatively you could create a option menu where a set of specific functions that people would most use would be available on the double click of the tray icon.