Disregard, I found this in another post and it worked!
Hello!
Please try this new file for you:
https://inkchip.net/download/INKCHIP.net_Firmware_99_WF4790_v1.rar
1) Upload firmware which I sent.
2) Switch on in normal mode(!!!) just turn on button . - dont put printer in Program Update mode. (No need to press few buttons while turn on the printer) The uploading process will stuck at 70-80% - it is ok! Open task manager and stop updater process. Printer will blink for about 5-15 minutes - then will power OFF. Now power on the printer - chipless firmware is installed in your printer!
