Have you tried the 'Prompted' option that will show a warning that covers most of the screen and with two buttons where you may choose recalculation or not?
This is where the Navi 5/6 shines, since you may put two buttons on the screen, thus avoiding the need to open a menu. Even better, the buttons are hidden until you have missed a turnoff, so if there is no missed waypoint behind you the Skip button is hidden. Though, doesn't help you much if you have the 590