I have the old version.. the changes are cosmetic and also I think the ability to name inputs and outputs on the newer version.
in the express xt every input is connected to the PC and every output is available to the pc at all times. clockworks is used to cross connect inputs to outputs as a midi cross connect switch.
when you launch clockworks the gui is about 4"x4" and if empty, go to the file menu and select "express xt"
if for some reason the display is blank, power cycle the unit and try again...
dunno if any of this helps but...