Doesn't work Rated 1 out of 5 stars

The download button doesn't show in the new layout of Youtube. I think it did work before. Can it be improved to show the download button in the new Youtube?
I'm going back to another download button that can't download the audio only (mp3), so I have to download the video too, even when there are only images that change every few minutes. It takes too long because of the bigger file.
I changed to this add-on for the mp3 feature, but because it doesn't work anymore I'm forced to go back. Please fix it if you have the time.

This review is for a previous version of the add-on (2.0). 

New Version Out 2.1

I made an update that should be available soon after the review, it fix the problem for the new youtube layout... Thanks for telling me and Enjoy ! :)