I downloaded and tried to install the firmware update from May of 2018. The update failed and the display on the printer kept reading "Programming". I left it alone for about an hour and it never changed. So I (foolishly apparently) powered it down and now when I start it up again I get the message mentioned above.

Is there some  way to flash the firmware back to its original state?

If it makes any difference I have a Windows laptop (Win 7) that I can connect to the printer vis USB to do any changes or troubleshooting.