SO...Just found a mention in the Manual: https://usermanuals.finalemusic.com/FinaleMac/Content/Finale/ht-accidentals.htm#accidentals-speedy-entry that if you hold the Option key when clicking the R...
Which, of course, is un-intuitive (IOW stupid). That's not the way music works - the accidental, once applied, stays in effect for the whole bar, so why wouldn't the notation software also follow t...