Add-On No Longer Working Rated 5 out of 5 stars

I have used and enjoyed this add-on for quite a while. However, after downloading the most recent update, the Video DownloadHelper button has vanished from the upper left area of the browser.

I have uninstalled/reinstalled the add-on, ensured it's activated, ensured the "show icon" features have been activated, and even uninstalled/reinstalled Firefox.

Also, the quick launch commands are not working, nor is the option appearing when I right click video content.

Please help!!

This review is for a previous version of the add-on (4.9.15.1-signed).