My recent replacement that came in January came with a notice in the box telling telling me to update but no separate shipment of new props, if I have the new ones they threw them in the box at the factory. The update was automatic the drone first time the app connected back to the drone after it's initial pairing.
Probably just me but I couldn't tell any difference in how they flew or acted between the earlier and the newer props or between my old and new drone except now it's a little more prone to disconnecting and they seem to have pushed out the point where it switches to GPS tracking.