yes i post it at GHL following your comments but i really the only best hope to get help is here !
The best way is to find a PC or laptop with serial R232 port and use the Flasher program to update the firmware. 99% of the time when I upgrade the firmware via USB, it crashes and the unit blanked out. Only the Flasher program can reliably erase the old firmware code and upload the new firmware code. I hate updating the firmware on the Profilux. I would have to pull out my very old laptop with the R232 port. It's the only way I can get the upgrade to work.