this is what i have found, but for the life of me , i can not get the kaos bin into O/S folder.
Updating the operating system
Please perform the following simple steps to update your KPA to a newer operating system:
You will need to use an empty USB stick in order to transfer the files from your Mac or PC to the KPA for the first time. When you connect a USB stick for the first time, the KPA will format it to ensure maximum reliability.
The next step is to download the latest operating system. Updates are free of charge and can be downloaded from the following URL:
http://www.kemperamps.com/start/
Expand the downloaded .zip archive and search for the update file called "kaos.bin" inside. Copy the file into the "OS Update" folder on the pre-formatted USB stick using your Mac or PC. Next, unmount the USB stick from your computer and plug it into the KPA. Follow the on screen instructions which will appear after a couple of seconds.