Does anyone know where i can directly download the newest DFU programmer, everytime i try download the new version from http://dfu-programmer.sourceforge.net/ i keep getting errors. It needs to be the 5.4 version since i'm using a uno with the atmega8u2 chip
Since you're using windows you probably want to use flip rather than dfu-programmer. You can download it here: http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3886. The dfu-programmer is for Linux and Mac OS X.