Flash QMK Firmware in VIAL

Step 1 Download Firmware

Step 2 (Put Your Keyboard into DFU (Bootloader) Mode Press and hold this button, and then connect it to the device.

Step 3 Open VIAL will see the "VIAL Bootloader" device. Then select the file you just downloaded and hit Flash.

Step4 Wait for the progress bar to reach 100%, then reconnect the dongle. All Done!