I'll explain more carefully. If you want to, you can delete and reinstall the entire thing (game) to have a blank slate for doing this:
Go into the game files and locate the folder called Aishteru_Data. Within this folder, there will already be a folder named 'debug'. Delete it. Then make a new folder inside of Aishteru_Data called 'debug'. Open this new folder and create a text document called 'debug'. Within this basic text document, type the word 'optimus'. If you want to, within the text document, hit file, then save the document after typing down 'optimus'.
Everything is lowercase. No periods needed.
The image attached shows what you need to do. The file location and where everything is located are underlined in blue. The notepad shows the text document.