Still, lower field first.
Graeme's Film Effects offes a great way of modifying the *perception* of motion. So much so, it looks quite close to true progressive sources. But it's still technically interlaced, and it still has some minor visual fields information left. So, you should still export as lower field first (or easier, just use Current Settings in the Export Window).
Adolfo Rozenfeld
Buenos Aires - Argentina
www.adolforozenfeld.com