Is there a way to delete the lyrics that the player downloaded, cause it's the wrong lyrics. Same with the album art. And is there a way to put in lyrics I find in the internet?
It's a free tool that allows you to edit all tags of any song (Or multiple songs at a time)
Using that, find the album you want to add album art to using the "New Directory" button.
Highlight the album, and go to "Tag Sources".
In the dropdown menu, choose album art, and then amazon.com (or .de if .com doesn't have it).
Follow the simple instructions provided after that selection and your album will have been tagged!