Switching off WiFi Assist has worked for us. Of course, I would rather be able to switch it back on, but for now it's been a good short-term solution.
It would be the same as all other application updates, you would need to log into the App Store Application to view available updates and initiate the update.
Please let us know if you have any questions.
TWC-Social Media Customer Care
Moderator - TWC Community Forums.
IT STILL SUCKS
Could you please be more specific? What problem are you having with the TWC TV app?