The path for the Monitored Folders is the same path as Scan for New Files:
F:\Dropbox\Muzik
I did notice that like what, happened a while ago, it had added another folder to the Monitored Folders without my doing. There are no music files in that folder, it is only used as a backup. Removing this did not stop the song from reappearing.
F:\Dropbox\MusicBee
The path of the file it keeps adding is:
C:\Users\Zak\Desktop\Tag Testing\Copy From - C