This application is not available anymore, which means that if you arrived to another link, it's possible that it expired. Any click on the page will lead you somewhere else. I have checked the Daniusoft website and the only converter that supports WMA and MP3 is Video Converter Ultimate. You can access its page in order to find out more.
To buy it, choose Windows or Mac, press on Buy Now and continue browsing until you reach the payment page. I have tested and it works normally.
Official website: http://www.daniusoft.com/media-converter-ultimate.html