Install avrdude. The simplest way to do this is to install the Arduino software and execute it out of the c:\Program Files (x86)\Arduino\hardware\tools\avr\bin\ directory (or the equivalent is on your platform).

Install Atmel Studio 7 (optional). avra should also work. These tools are only needed if you want do change the code. Both products are free downloads.

Open the real\boom.atsln solution in Atmel Studio and build it or assemble main.asm if using avra.

Execute the burn.cmd script to copy the built binary onto your Arduino.