Make sure you are referencing the local folder and not the full domain, meaning that instead of this...
shutDown = loadImage("C:/Users/kevin/Desktop/processing-3.5.3/Files/FGP/shutdown2.png");
gamExe = loadImage("C:/Users/kevin/Desktop/processing-3.5.3/Files/FGP/game.png");
etc.
It should look like this with all the asset files in the data subfolder of your project folder:
shutDown = loadImage("shutdown2.png");
gamExe = loadImage("game.png");
etc.