Plutonium

Dss0 im on 1201 but it says my game is outdated but i dont know how to run plutonium.exe i had the game before the launcher and then i got a new pc and got the game when the launcher came out so ive never had to update before

Dss0 How do i do that? because im in the plutonium launcher

How do i update plutonium because i can't load into any servers

Does anyone know how to fix this problem??