Not exactly what you're looking for, but there's an old script in the help files called Favorite Folders that may do what you need, or lead you to a solution.
I'll see if I can find it.
Look in the AHK Help for "Easy Access to Favorite Folders" By Savage.
I've used this script since about 2008, and learned a lot from it.
Another idea - have a separate script running that waits for the Tray Top and it's text, gets the X, Y coordinates, and if there's a click there opens your file. I'm not sure if this will be easy to do or is realistic at all.