Facility Manager Question

Is there a way to reset contiguity and seat numbers on a partially-constructed facility map? Basically, I built the basic layout, including seat numbers and contiguity, then the map changed significantly (we're a black box theater, so we build new facility maps every season for our ever-changing configurations).  I was able to reset all the seats I'd laid out back to non-seats in Map Painter, but the numbers and contiguity I'd set on them already are still showing up on the non-seats - how can I wipe those so that I can start the map over, in the same facility?