SongKong can inform iTunes of any changes made but if you use iTunes you should understand how some iTunes options can effect SongKong. Notably a default iTunes installation will make a copy of every files added to iTunes so if you are trying to match a pre-existing iTunes library you’ll want to point SongKong at the iTunes copies of your files. When processing a larger collection it is often simpler and cleaner to fix your songs without enabling iTunes updating and then create a brand new iTunes library and upload your newly organized music in one go.