Psychloroform

So i made a backup override file for kotor 2 , but i accidentally deleted it . Is there anyway I coulg go about wiping my whole folder and getting the original contents of it back without the mods just the original game files ? or if i delete it will it be permanently deleted forever ? Also , how useful is the kotor mod manager by chuck chargin jr and how do you use it ?

A mass majority of my weapons and items do not have icons , just white boxes , and they are unequippable , I equip them and its not shown in my hand or equipped . It's even affected my other weapon mods that arent lightsabers , i can't see them either .