dButtons is a handy little utility for Macintosh PowerBook Duo owners. dButtons is a new stand-alone control panel that allows Duo owners to alter the behavior of their trackball buttons. dButtons will allow you to change from single-click behaviors to one of no click, single click, double click or click lock. These behaviors remain constant between Shut Downs, Restarts and Sleep sessions. Version 1.0.1 Fixes expiration bug. Shareware fee of $5.