Sorry for the Self promotion, but did you know all the firmware archive are available on https://gbatemp.net/download/gulikit-kk3-max-ns39-firmware.38417/ ?
firmware udpated again Firmware for Gulikit KK3 Max updated to 3.3 https://gbatemp.net/download/gulikit-kk3-max-ns39-firmware.38417/