Back out until you get to the Doki Doki Literature Club folder, mine is in a list of my other steam games in a folder called common, which is in a folder called steamapps. Inside the DDLC folder is also the ominous character folder and inside it is one file labeled monika.chr. You can easily Delete Monika’s file from your computer with the help of Steam and also you can do that without steam. You just have to delete Monika’s folder from the Characters in DDLC.
Guide on how to unlock the secret Monika route. It requires a little file manipulation.You can chat with Monika ddlc here. Ask to Monika ddlc whatever you want. Talk to Monika ddlc online right now. Chat with Monika ddlc's chatbot is very easy and funny. Monika then instructs you to delete the persistent data that contains both her and Wallace. This file is found in the main DDLC game folder, not in your AppData. After deleting this file, the game will update, deleting Wallace and Monika's memory of everything that has happened. In Act 4, after starting a new game, the game appears to be normal, up until Sayori addresses the player at the end of the day, thanking them for deleting Monika.At this, Monika comes to the realization that any character who falls into the president role will become self-aware and figure out that DDLC is actually just a game and that the characters have no free will.
Alternatively, you can go into This PC, program filesx86, Steam, Steam apps, common and finding Doki Doki Literature Club in your list of games.