You can install the official version from dvdfab website and the licence works.
Tried and works fine. https://www.dvdfab.cn/youtube-to-mp3.htm
Reply To: DVDFab YouTube to MP3 / Aug 23 2018
You can install the official version from dvdfab website and the licence works.
Tried and works fine. https://www.dvdfab.cn/youtube-to-mp3.htm