There's always a problem with computer based equipment that makes you want to smash it and send it back to the manufacture.
I followed the manual instruction & the instruction provided by forum users. My Kemper will not locate kaos.bin version 2.3.3. The current version factory installed is 2.2.1
I first erased the 4G stick, formatted OSx Journaled.
I turned on the Kemper and set it to "Profiler".
I plugged in the USB stick to allow Kemper to format it to Phat32.
Then plugged stick back into my Mac to drag and drop "kaos.bin" version 2.3.3. into OS Update folder.
I turned the Kemper off and plugged in the stick.
I pressed and held both "< PAGE >" buttons while turning Kemper on to "Tuner." (This is not mentioned in the manual. I only tried this after the manual failed to produced the desired result)
The message I still got is: "ERROR: unable to locate firmware file on USB device"
The creator should of followed his working updating system as with his Virus-TI: straight from the computer to the device via USB cable.
PS: Why can't they update the thing to the latest existing version, 2.3.3 at the factory before mailing out.