Autotag to preserve existing tags
Sometimes, I have tagged my files with the correct album, etc, and I don't want autotagger to change things, but rather just fill in missing information such as composer, genre or year.
Therefore, an option to "Preserve Existing Tags" would be great.
Even better an option to allow the autotagger to assume that information already entered is correct, and fill in missing/incorrect information based on that.
For example, If I am sure that the album I have entered is correct, it will look for the song on THAT album, and tag correctly, rather than go for another possible album (such as compilation/soundtrack) for tagging