sorry, but i think you're screwed.
Although, while looking through the song in your "music" folder, you may find another tdata, or music, or somthing folder.
what i mean is, it will look somthing like this:
tdata/fffe0000/music/0001/tdata/fffe0000/music/
and there will be another st.db file in there. the st.db files tells the xbox what songs you have. I think that could be a backup of the one in the first music folder, or maybe the program just makes two bad ones, i don't know.
try replacing the normal one with the one inside more folders.
see, the program messes up your st.db file. So you need to make a backup next time so it can't ruin your songs, like it did to me, and many others.
I'd wait untill they release a stable version before using the program.