I think it would be useful if there were a Project submenu (maybe called "All Projects") that displayed a list of radio buttons -- one for each project in your project directory -- such that you could quickly switch from one project to another by just selecting one of the radio buttons.
It would probably also be useful, and a nice touch, is if the optional project description text could be used as the popup text that you get when you hover the mouse over the corresponding radio button.
Incidentally, the documentation mentions that "Usually it's best to store all your project files in the same directory", however, I'm finding it useful to just associate a project file with a bunch of loosely-associated files from all over the file system. That is, for when I'm regularly working on something that simply requires a certain bunch of odd-ball disparate files to all be open at the same time.
Thanks, ---John