Firmware is for units with a software version of 0090 or greater, if firmware is unable to be updated or you have already flashed this version it will not load.Download the firmware from the link above.Copy the file mdi.bin.enc in the root (top) level of a USB flash drive and insert this into the USB cable.Turn the headunit on and the update will proceed. If the MDI is selected the status will be displayed.After around 1 minute the update will complete and the USB flash drive may be removed.