KBD75 R3+ QMK How-to Guide

credit: https://github.com/TranquilMarmot

The QMK firmware docs should be looked at instead: https://docs.qmk.fm/#/

TL;DR:

• Go to https://config.qmk.fm/ and load your keyboard and change the layout to your liking
• Click the "Compile" button in the top right
• This will take a minute, but you should eventually be able to click the "Firmware" button to download a .hex file
• Download QMK toolbox from here: https://github.com/qmk/qmk_toolbox/releases
• Open the .hex file from above
• Follow the steps here to put your keyboard into bootloader mode: https://docs.qmk.fm/#/newbs_flashing
• You should see some yellow text in QMK toolbox
• Click the "Flash" button
• Done 😃