List music as files again

Some time during the os updates all my music files are listed as folders and not as file names any more. Fotomagico recognizes the artist folders in itunes as file names. Can´t seem to resolve this and I have to import tunes by searching listing them in itunes and then importing from itunes. Does anyone have the same problem or a solution?

I want to see the names of all songs in the file name column and not their artist folders.