40PF4706/F7 PHL-0AB_321_0 140732476-1029388440 firmware

Netflix ESN deactivation will not work. Firmware update reports "Current software in your TV is a newer version". The firmware downloaded from the network connection and updated from 318 to 321. After the update the TV failed to connect to netflix as the app crashes back to the net TV desktop.

Is there any way to downgrade the firmware / re-flash so that the app can be overwritten? We've been through Netflix and Philips support a few times now and there doesn't seem to be any fix in sight.