So, I have just finished chapter 4 and I have collected the 4 codes that can be found there. After that, I went digging through the game folders and discovered that each code was linked to a hidden word in several folders forming sentences. I then found MBPSmileTerminal which asked me to give it a code. I tried to enter the code several ways but nothing worked. So maybe the two are not related, but then what is the code that the MBPSmileTerminal asks for and what do the codes in Chapter 4 mean?

CODES (Big spoiler from Chapter 4)
In chapter 4, you can find 4 codes being "A01", "U93", "R05" and "Y38". You can find each in a series of folders located here: Steam\steamapps\common\My Beautiful Paper Smile\WindowsNoEditor\MBPSmileTerminal\BaseX64_PS.
A01 can be found in the "Which\One\Now\won't\live" folders with a notepad saying "hunters".
U93 can be found in the "Which\One\condition\lies" folders with a notepad saying "say".
R05 can be found in the "Which\Ritual\saves" folders with a notepad saying "your".
Y38 can be found in the "Which\One\Now\may\know" folders with a notepad saying "name".

If you have the solution or a track, I'm interested. I'm a big fan of this kind of ARG, but not super good at solving puzzles.