When a constituent's spouse is marked deceased, his or her spouse will continue to appear in the addressee and salutation. It is currently necessary to select a new addressee from the drop down or to use an editable addressee.
If a spouse is deceased they should not be considered a spouse for the purposes of the addressee/salutation.
If you uncheck the spouse box, the deceased spouse name is automatically dropped.
I have to say, that or some reason unchecking the box does not always seem to work. Maybe it's that the salutation formulas still have an "and" or something. But I try to go in and check just to be sure and for one reason or another I usually change something.