This is referring to this page here.
Sorry i could not see a better way to report this aside from posting here...
First up, Suse imagewriter is no longer available. And the the version i found would not work. The link is broken.
I have found and tested / verfied a good install using another method that it may pay to put into your docs so that people from windows can have an easier time, as it does seem like a really awesome distro.
1st: Download Universal USB Installer, https://pendrivelinux.com/universal-usb-installer-easy-as-1-2-3/
When in the application select your USB key and tell it to "prepare your device"
Once this has done, select the option at the very bottom of the list for "Unlisted ISO"
It will prompt you to select the KaOS iso that you have downloaded.
From here, run through the process, and you now have a bootable USB.
Note: on my test it created two EFI options in the bios for this USB, second one is what worked.
Now boot and install KaOS and enjoy.