Help with flashing infinity 60% board

[LevelSteam]

I recently picked up an Infinity 60% kit and put it together myself. It's the first keyboard I've ever built on my own and I'm pretty happy with how smoothly everything went, but I can't figure out how to flash a new layout to it. I've followed the steps outlined here: https://input.club/devices/infinity-keyboard/infinity-60-build-guide/, but I'm just having trouble with their utility recognizing my keyboard on my windows PC. I figured if anyone knew how to flash a custom layout (made using their configurator) to the board, I'd find them here.

Any help or insight is appreciated, thanks.

[toinux]

follow the steps here : https://github.com/kiibohd/controller/wiki/Loading-DFU-Firmware

[LevelSteam]

I've been getting that "return code 0" window with their utility. I'll try your process when I get home. Thanks!