Bigme Monitor B251 Firmware downgraded from v1.0.7 to v1.0.4 alone :(

The story is as follows:

1. I purchased a Bigme B251 Monitor 6 months ago. Initially, the mouse was lagging a lot, and the monitor was barely usable. The firmware was F1.0.4 (I am a mac OS user). (see more on this archived post)
2. At some point the firmware updated alone, and I was on F1.0.7 and the refresh lag decreased considerably and honestly the monitor usage was amazing! The mouse lag was so small and I was super happy with the monitor
3. This morning the mouse lag appeared again, without me doing anything. I checked and the firmware is again back to F1.0.4

So, I have been trying to update the Firmware manually, following Bigme Official Instructions here. I am a mac user. So, I downloaded the DMG file from the official site, but it fails to burn the firmware. Actually, after opening a port, the installer successfully finds a new version which is F1.0.8, but then I get a message saying (see attached image):

- Burning F1.FW.....

- F1.FW no ack!!!

- burning F1.FW fail!

I have tried opening different ports but it makes no difference. Any clue on how I can get back to the latest firmware? I have also posted this message on this thread for visibility.

https://preview.redd.it/09p92g00ngne1.png?width=876&format=png&auto=webp&s=8c844748623818991148c73b2663536b23d04289