Hi, I would like to use LiveSplit for a non-speedrunning purpose (obviously) and I was wondering if there were a way to reverse the timer so that it considers longer times = better?

I believe there's a compare against worse time setting

Unfortunately LiveSplit doesn't appear to be equipped for that. Short of creating a custom component (and even that might not give you enough flexibility), you'd probably just have to manually put in your new "PB" if it's slower than the current one.