Modern flight controllers are typically flashed in USB DFU mode. This is a straight-forward process ... The easiest way to do that is to download Zadig. With the board connected and in bootloader mode ...
1. Download Zadig from https://zadig.akeo.ie/. # 2. With your switch plugged in and on the Tinfoil USB install menu, # choose "List All Devices" under the options menu in Zadig, and select libnx USB ...