I'm trying to do some legit runs in the vanny out of bounds category, but I can't get Livesplit to pause at the same time as I pause the game. I've tried making the pause function bind to the escape button, but it won't work (escape apparently can't be binded to in Livesplit) Is there an application you're allowed to use here?

Have you tried using autospliter? You can download it on resources page

My computer keeps asking me which app to download the link with but I don't know which one

You can find a tutorial on FNAF: Security Breach Speedrunning discord server. I dunno if it is illegal to post links here, but here's the invite: https://discord.com/invite/sbspeedrunning. When u join, go to resources channel and go to the very top. U will find the tutorial there. edit: oh wait, i thought u meant u want to stop timer as soon as u finish the game, the was an easier option. u could just press RMB on the livesplit and then click on 'edit layout'. Then press + and add a new timer. double click on the new timer and change timing method to 'Game Time'. That way u get 2 timers, one for real time and second for game time