How do you roll back the Firmware exactly? I'm have issues with my A/C which i'm sure has only started since upgrading from 1.4.1 to 1.5.1 this is on LEM G3 in a MY00 WRX. I open up the firmware update for Version 1.4.1 to try and roll it back but it can't find the ecu, this is with no other programs running on the laptop or PC Link connected???