Zip file you can update in 2 ways.
First is by Local update in your TV Setting/Device...Software update.
Second is ...OFF TV by remote long press "Off" button with OK conformation.
Once TV is Off ,press and hold power button on TV,until update process start.
Once process start release button.
Be sure file(s) is not "broken", try to change another FAT32 USB or TV input.
I have no other idea......