If you really wanted change your path you don't need to edit the save file. But it will still time consuming, basically you'd need to extract the files from the archive. Look at the relevant .rpy files and find the variables that need to be changed. Once you know what needs to be changed. Modify the options.rpy to include a line to enable the console and change those variables while in-game. Of course if you mess with the variables it might break your game so change them at your own risk. The safest option (and most boring) is to just read the text in the .rpy files if you really want to know what happens.