Twitch problem: On Github download as zip (Stupid me couldn't find the download button, its on the right-side-bar. Self-noob).
Find twitch.py file in the zip livestreamer-develop\src\livestreamer\plugins.
Go to Programfiles, C:\Program Files\Livestreamer\livestreamer-1.11.0-py2.7.egg\livestreamer\plugins.
Just copy the file, and remove the twitch.py*c* (older version of course)
Or just wait for the new Update I think. Maybe other fixes, but Twitch-users this is fastest/temporarily solution