Same exact scenario here except I am running v2581. Where did you get v2664 from? Link me and i'll test for u
Maybe create a portable Listary install and try again? Rebuild index?
How do you access control panel items? EDIT: That's the discrepancy. I manually create shortcuts from control panel in a folder and have listary index them.
EDIT 2: got 2664. Control panel links work fine. Launching Ctrl panel works too. I don't know where to get .cpl files to test out