You might try in the Schreiben/Write section only checking ID3v2.3 tags, not the ID3v1 tags and change the option from ISO-8859-1 to UTF-16. Also, try unchecking the box for Entfernen/Remove ID3v2.
You might try in the Schreiben/Write section only checking ID3v2.3 tags, not the ID3v1 tags and change the option from ISO-8859-1 to UTF-16. Also, try unchecking the box for Entfernen/Remove ID3v2.