Hello !
It seems like you are quite confused about it. So let me explain how to modify the settings.sla file :
What you actually need is a hex editor software. If you modify the game files on PC, I recommend HxD, but there are other hex editors that you can use as well. The reason for using a hex editor software is to prevent the game from crashing when modifying the settings.sla file.
Also, make sure that the seetings.sla file should have the same amount of characters as the unedited version. Otherwise, the game will crash.
As for most hex editors, the readable texts are located on the right side of the software window. It's a bit clumsy to make modifications on softwares like this, but when using it quite often, I think you can get used to it.