This is firmware for the Ender 3 pro Unicorn Edition. Compiled by me.
Version 3.5 is stable just rename it to firmware3.5.bin. This firmware is for the 4.2.7 silent board, BLTouch, and BigTreechtech filament sensor.
Version 3.6 is beta and untested
version 4.0 is for the ENDER 3 VERSION 2 LCD screen.