Let's you quickly add or subtract a selection of objects to a selection of lights. Pick the objects that need to be added or subtracted - hit the first button. Choose to add or subtract - then hit the second button. Objects will be added to existing list - so if it's already got an exclude list - they'll be added to that. If it has an include list - well - they'll be added to that. Also includes a button to just clear the lists on all selected lights. Might work in R3 - haven't tried.