Thanks for this its much appreciated.
Unfortunately the original firmware posted is not the correct firmware for the Droix x4, the version posted is the ATV version not the one that was factory installed.
The correct way to use the Amlogic Burning Tool is also not as shown in the instructions supplied with the firmware.
1. Load .img into Burning Tool
2. Press start -
Do not connect a power supply or it will not work
3. Using toothpick press reset button and insert cable into OTG slot. (I had to use a USB 3 cable before I achieved a connection)
4. Release reset button when you see notification in the Burning Tool interface.
A copy of the correct .img file would be greatly appreciated.