Channels Update

I have 4 FireSticks.
One is running Channels 4.2.
The other 3 are running Channels 4.3.
I hate to be obtuse, but how do I update these to the latest version??

Simply go to the admin web interface and click "check for updates". See below:


@psperry he's asking for Fire TV client app updates, not server updates.

@MyFriendsCallMeTommy go to that stick's Settings and make sure you have automatic updates toggled on. I don't have it in front of me right now, but I think it's under Settings > Applications > Appstore. You can also try to update the app individually, and every once in a while you'll find an update waiting for you as shown on this web page.