Warning: Do not turn on SMPS Power supply till Step: Powering Up
If you want to use the latest marlin source and build it your self, then refer guide Building Marlin (For Advanced Maker)
#Programming Arduino ##Step 1: Download firmware and the tool
We have precompiled the Marlin firmware for WoodMAXi3, you can download it: Marlin.zip
Then unzip both files.
##Step 2: Upload the firmware
Start the Xloader application with Administrative permission (in windows)
Browse and select the Marlin.hex file (Marlin.hex is inside Marlin.zip) and click upload
Wait till firmware is uploaded.