Link to Download ExpressLRS Configurator:
https://github.com/ExpressLRS/Express...

Steps to flash RadioMaster TX12 MKII ELRS covered in this video:
1) Download ExpressLRS Configurator
2) Download luascript & .bin file
3) Push script to Radiomaster using usb-c cable
4) Push .bin to Radiomaster using wifi

I hope this video is able to help a few people out. Please feel free to leave any questions or comments below.