Thanks for making this.
Here’s the specific 51.28 hex file I used when testing Makerverse: cnc_ctrl_v1.ino.hex (169.6 KB)
However, installing a Hex file is the same as installing the firmware via the Arduino IDE. I personally like the Arduino IDE approach because I can see what happened during the install process. I can also use the “Serial Monitor” to ensure that the firmware installed correctly. This is a good basic familiarity to have with your Arduino, if you have time. If you’re comfortable with it, just select the “Arduino Mega 2560” board and grab the source code from https://github.com/WebControlCNC/Firmware/releases .