Just how you would normally move files around!~
After your playing session, you create a folder in a different location on your computer and name this one "backup save". Then go to your "The Best Master" folder and into the "save" folder, copy everything that's in there and paste it into the new folder called "backup save". When you want to continue playing, you go into your "backup save" folder, copy everything that's in there and paste it into the "save" folder in the "The Best Master" folder.
I hope I've explained it well enough, ha ha!~
I can't promise it will work, but it might be a possibility!