A second thing, and I guess this is more a suggestion, is to reconsider the way those files are saved in the .unwanted folder, I guess you create those files there just in case the person decides to continue downloading the files after marking them as "Don't download", but it could take quite a lot of space, so I'd like if that behaviour could be optional and have an option in the settings along the lines of "Preserve uncomplete unwanted files".
Other than that I really like this software
