Must ORG application to be bootloader to 0x1800 !
latest versions are in github https://github.com/charlie-x/l1_demoboard
might need to correct some of the offsets in the gld scripts.
Bootloader HEX file
QT Windows Version of HID bootloader
Native versions of windows / osx and linux bootloader tool
Org your code to 0x1800 example :
program (xr) : ORIGIN = 0x1800, LENGTH = 0x2A9F6
jumper goes here, red wires are an LED, look for the jumper next to it.