The funny thing is that the prior two updates didn't seem to replace that Plugin. This one did (with the Sierra one).
Usually I just have to touch the file, use kext utility to clear / rebuild the kernel cache and reboot. This time I had to copy it back in.
Heh...want to hear something really weird? This update broke my unlocking with Apple Watch. No amount of toggling, signing out of iCloud, etc could get it working again. I add this PlugIn back in and boom, it's working again.
btw - anyone with a MacBook Pro 4,1 that wants to go the same route that I did and get an mCard to give your system BLE 4.0 and 802.11AC wifi - get their mCard 3, not their mCArd 2 - while the original Airport Express in our systems only used 2 wifi antennae, there's actually an unused 3rd one there. May as well get the extra 250Mb/s+ out of the card.

Told QuickerTek about this - they're updating their compatibility matrix.