I believe it doesn't work like that, whatever the current save is on the game will always be the save. I'm not sure though. I already finished three routes and can't proceed because I don't want to replace my save files :(
Sorry, I'm not good at English, so I can't understand your words well. Did you mean you're not sure saving files would work later or save files should be looked in game?
Well, whatever you meant, I agree. Then how about copying your games to another folder (or download again to another folder) and play? It will not show up a complete CG compounds(I meant, the extra tab in game.) but you can have another 15 rows for save file.