Arduino Mega 2560 bootloader

You may have to remove/uninstall the Jungo driver & install the MKii driver so they don't conflict.

I load 328 & 1284 boards with mine using the IDE.
I burn a bootloader first to set the fuses, and then use File:Upload Using Programmer to load the sketch and leave out the bootloader when I want sketches to start immediately after a reset.