Hopefully this will help others.
I used the Hikvision
TFTP server and the fake 5.5 firmware binary. I got all 14 rolled back to 5.4.5 170124 and they are all working again.
I initially tried to do them over the network and that failed, sort of expected. I tried with a Ubiquiti US-8-150W POE switch, a Ubiquiti US-8-60W and a TP-Link unmanaged POE switch. The TFTP program never saw the cameras and Wireshark never saw the cameras request for 192.0.0.128. My thinking is that the switches did not negotiate a connection fast enough for the TFTP server to see the bootloader request for 192.0.0.128.
With a dumb switch and a 12V power supply and the camera on my bench, it worked immediately. I connected the Windows 7 machine running TFTP to the switch, connected the camera to the switch, then applied 12V from the power supply to the camera.
The problem with this is 10 of the 14 cameras are mounted up high and outside and two of them are mounted high inside the house, meaning that I would have to pull them down one by one, reflashing the camera, installing them and aiming them again if needed. That is a lot of work.
I went to Microcenter and picked up a TP-Link POE injector, connected it to a dumb switch (a crossover cable would also work) and connected the TFTP server to the switch. I powered the injector, started TFTP and plugged the first cameras cable into the injector. TFTP started immediately and uploaded the firmware in about a minute. The next 13 all worked the same and I had them all done in less than 30 minutes. Then I used the SADP tool to reactivate them and set them for DHCP. I had originally set them for static IPs in 2016, but now that I have all UBNT equipment, I used DHCP reservations to set their addresses. Then I used the batch config tool to reflash them with a downloaded 5.4.5 just to make sure the binary was correct.
I used the TFTP program posted above by alastairstevenson and the fake 5.5 firmware from a post linked above.
I want to thank all for the help here and I hope this will help others in the same boat.