The Ez3D software only works with Ez3D firmware. Installing any other firmware will prevent the software from ever discovering your printer. If you re-flash your firmware, and want to revert back to Ez3D's firmware, follow these instructions:
- If you don't already have it, download the Arduino software.
- Download the Phoenix version of the Marlin firmware.
- Extract the ZIP file.
- Rename the PhoenixMarlin folder to Marlin
- Open the Arduino Software.
- Open the Marlin.ino file from the Arduino software.
- Click Tools->Serial Port, and select the serial port your printer is on.
- Click Tools -> Board -> Arduino Mega 2560.
- Click the "Upload" button.