I believe you place the save folder in the “www” folder. Its the one that has the data and img folders.
If your a mac user, what helped me was this...
1.) Download pre-made save files.
2.) Right click the game folder and click "Show Package Contents."
3.) Click the contents folder then the Resources Folder.
4.) I had to play around with it a bit but I ended up deleting the prior "save" folder that is already defaulted there then dragged the pre-made game save folder there and it ended up working.