You can download UnRen.bat. Its a free tool that will unarchive all renpy files, images, and everything in a renpy game so you can alter any settings. Youll just have to find which file they put those commands in.It can vary. Use Notepad++ to quickly edit the RPY files and resave them.
You are still charging for the 5.3 or 5.4 ? There is no link on itch for the download of them under name your price. when will you be making these older versions free?