So I've looked in the comments and I found script for mods, so I used that, but everytime I try to open it it says that it can't delete the old script.
This is the script I'm using:
; Friday Night Funkin' custom controls
SetTitleMatchMode, 2
#IfWinActive FNF | Smoke 'Em Out Struggle
#MaxHotkeysPerInterval 2000
d::Left
f::Down
k::Up
l::Right