While there is a pre-defined action allowing a gesture to open BTT's preference window (which I don't do enough to assign a gesture for), opening it by going to the BTT menu icon requires a click to open, a move to get to the preference item, and a second click to open the window. Basically three actions, click, move, click.
Could there be an option set-able within BBT's preference window (or menu dropdown) allowing a single click on the BTT menu item to directly open the preference window and perhaps a second button (within BBT's preference window) to reveal the other menu options that would be bypassed by having a click directly open the window?