I am not using cheat for hunt showdown but i guess it goes the same as paladins, RR, and apex ( the one i use)
Start your loader from USB DRIVE, login, select the cheat from left side, and press ''launch''. Just wait 60 seconds after you started the game and press INSERT. That should work,
Also make sure you run the cheat client as ''RUN AS ADMIN''
LE: This is testimonails forum section, not support