Mitras LX7 connection and firmware issue

Dear Friends,
Some time ago I received my Mitras LX7206 lamp.
I first installed it in a Windows 10 PC but couldn´t update the firmware.
I followed videos, indications, posts, etc, but every time I tryed to update the firmware, it was not possible.
It "says" there´s a comunication problem etc.

So, I decided to try on a different PC. A Macbook with Windows 10 installed in a partition.
I downloaded GHL Control Center and installed the USB cable on the lamp.
But unfortunatelly, when I introduced the other end of the USB cable in the PC, nothing happened.
It simply makes nothing.
No USB installation, and therefore no comunication with GHL software.

Don´t know what to do.
An other strange thing is that the light looses Wifi comunication one day and an other, so I have to cut it´s electricity, plug it again, and a few minutes later, it restores the wifi settings.

I would REALLY appreciate some ideas here, since the light is giving me the hardest time.

THANKS

Luis

Forgot to mention, that, when it starts de Firmware update, the lamps goes off, as it should, then on, and I receive a message saying that can't communicate with the lamp any more and that I should turn it off to restar. That donde, no update is completed and I am left where I started.

This is being handled via email.