WF 2850 only printing black after Chipless Firmware update and licensing

[TomLeogrande 0]

I have a WF-2850 and I used your app to downgrade the firmware version "BL05K3".

I purchased and added activated it.  

Now I can only print black.  

Update: I reset the firmware back to the latest by EPSON and replaced new real Epson cartridges and it prints fine.  

Redid the Firmware downgrade and activated it -   Same problem. 

Any ideas?

[TomLeogrande 0]

I have bought no less that 10 licenses from ChiplessSolutions.com -   Should I request a refund?  Or is there a solution to this? 

Thank you