Step 1. Download Github repo
Important stuff is:
Flash compiled file: https://github.com/soynerdito/BadgeUsbasp/raw/master/main.hex
MakeFile for easier flash: https://github.com/soynerdito/BadgeUsbasp/blob/master/Makefile
Step 2: Get your badge ready
Connect your Badge into the PC usb and press the reset button.
On Linux you should see something like (with lsusb):
"...ID 16c0:05dc Van Ooijen Technische Informatica shared ID for use with libusb"
On Windows you may need to install some drivers
If on windows 10 you may need signed driver. Use Adafruit's drivers,