Go ahead and check your Chromecast with Google TV for updates. To do this on your Chromecast with Google TV home screen, choose Settings > System > About > System update. I was personally able to perform the update a bit earlier today.
I hope that helps, and if you have any other questions or concerns for me, please let me know.
Interesting, I just checked on mine as I have for the past week or so. At first it said "no updates to install. last checked <the time>." and then it flickered and showed the download screen for the new one. Either way it's installed and working now.
Thanks for updating us. Glad to know that it's already working now.
Since this has been resolved, we'll consider this complete and will lock the thread in 24 hours. Feel free to start a new thread anytime you need assistance with your Chromecast devices and the Community would gladly lend a hand.