Rated 5 out of 5 stars
Even my Quicktext add-on was not supported by the latest update V52.5. then I tried something and it worked like magic. I downloaded the add-on file and then dragged it to add-ons page of TB manually and Whollla... It worked like charm and it installed my favorite add-on Quciktet in the latest version of TB.
Hope it might help you to....