The RPYC file is created by the game when you first run it. It is the COMPILED version of that script (hence the "C" on the end). Run the game without the RPYC, then after it loads, quit the game and check the game folder, you will see a new RPYC file there. That's what scripting languages like RenPY/Python are all about. They allow a dev to change things in the script, save it and then the executable game will compile it at runtime. The RPYC file in that zip is simply a compiled version, you can ignore it and let your game compile it yourself. If you edit your PatchSG.rpy file, it will recompile it as a new RPYC version at runtime, incorporating your changes.