The latest version of QYT2MP3 is located at Sourceforge downloads:

Version 3.0.1

Download - Windows 9x/2000/XP/Vista/7 32bit (Installer)

Download - Windows 9x/2000/XP/Vista/7 32bit (ZIP)

Other versions: https://sourceforge.net/projects/quickyoutube/files/

Note: QYT2MP3 requires ffmpeg to convert videos to MP3 (Included)