I have noticed that using v.1.0.9 (316) that the "Open Recent" menu does not clear itself of completed puzzles that I have put in the trash. The puzzle list on this menu is growing longer and many of the items are in the trash.
I fairly certain that in versions previous to this one, items in the trash were deleted from the "Open Recent" menu upon Quit. That way, when I started up again, only those puzzles that I had not completed were listed in that menu.
This seems like a little thing, but I always thought what an elegant function that was.