Sometimes I'll download something and want to browse the folder in the Explorer tab. At the moment I need to use the folder tree to explore, and maybe sort the list by 'date modified/created' to find it easily - so a button to automatically go to the last folder accessed by alt.binz for download/extraction would be very handy.
Slightly more complex than that, but possibly more useful, would be an option to alter the behaviour of the 'back/forward' buttons (or to add seperate ones) so that they also move back/forward through any folders recently downloaded/extracted to, as well as those that have been manually navigated to.