I have an Epson WF-3720 printer.
The Firmware file contained in the zip file was FWF469TL.efu
The Firmware file listed with the Epson Firmware Updater was 30.68.CL2112, when it was finished it read ROM Version 30.74.CL27J9
I purchased the activation code for $35.
When I went to activate it online, I received a pop-up with "Wrong ID Readed from the printer!"
What is going on?