Quote Originally Posted by Moorea View Post
you have to hit "refresh" after you switch between retail and classic in the twitch app - it's a bit buggy
I am pretty sure I did that and that, after selecting classic, I fully closed the client and logged back in with no success.

I then went and downloaded the zip file manually, unzipped it, and copy/pasted it into the addon folder and now it shows up in the Twitch client...