@Ratchapon > Deleting the program won't help as files are retained in the Library folder in case you reinstall at a later time. I'm guessing your username from your restoration doesn't match your current username and thus the file folders are different.
Try loading this folder:
/Users/yourusername/Library/Pioneer/rekordbox
That's the location you're seeing in the settings in rekordbox. Next, go to /Users and see if you have another user file there with the other username and drill down to the same location:
/Users/otheryourusername/Library/Pioneer/rekordbox
Let me know what you find and I can give further instruction.