Bricked 2xTHQ-SEM-FSMGA after firmware upgrade

[captjack]

Greetings,
I just performed a firmware upgrade for my 2xTHQ-SEM-FSMGA to 2.19.6 using Zbootloader 1.96.
Everything worked prior to the upgrade. As soon as the upgrade finished, the hardware went completely dead.
Tried to unplug and plug back, restart PC, but nothing happens.
For the upgrade i used the file _GNX_USB_Controller_v2_19_6.vkb
Kindly note that just before this, i upgraded my Gladiator NXT to the same firmware (using the file _Gladiator_NXT_v2_19_6.vkb) with zero issues.

Can somebody please help/advise on what i can do, or it's gone for good?
Thank you

[fallout9]

Plug the NXT device to USB while shorting the 2 pins marked Boot on the back of the GNX HID controller and release them as soon as the LED flashes. Flash the device afterwards with the attached firmware, it's the most stable for the GNX HID Controller, recommended to all users who are facing this kind of issue.

[Victorus]

Try Zbootloader 2.01