look for the save folder located in the Demon Deals folder after you extract it from the zip, open your old demon deals folder and locate the saves in there, then just drag and drop the files inside your old save folder into the new one
you should be able to just drag your old save folder into the new versions game directory and overwrite then play your old saves. Make sure both versions were properly extracted from the zip folders and moved to somewhere on your computer you have permissions
