No Button Rated 2 out of 5 stars

Can't seem to find "the button" anywhere, what am I missing here? I'm also currently using the 1-Click YouTube Video Downloader, is there any known interference issues with other plugins of a similar nature perhaps? I disabled all my other plugins just to be prudent but still a no-go.

This review is for a previous version of the add-on (1.0.4).