Please Note: this firmware is identified as 7080.2 which is the same as 2080.2 except that this special version can also be used to downgrade screen running on version superior to 2080.2
Unzip the file
Rename the obtained folder to T-KTMLAKUC
Move the folder to the root of your USB drive
Connect the USB key to your screen
With the remote control : Menu > Support > Software Update > Update Now
The firmware process will take a few minutes and your screen will reboot automatically