Hi again, if you want to change the knife skin then you will have to get the 'v_knife.mdl' file and paste it in the 'c-valorant 1.6/cstrike/models' folder. Since this is just a cs 1.6 mod, you cannot directly switch skins.
In the future, I might create software that allows you to change skins with a simple click. For now, a 5-star rating or a small donation would help motivate me to continue adding new features and improvements. Thanks for playing.