I just spent the last few hours trying to figure out how to install 12 after my new hosting service installed the 11.0.4 version that is standard on there server.

I asked the tech support to do it and they got a Error 500. Now, I have wait for another few hours to have them erase it and reinstall the 11, hoping I can use the update channel suggestion another suggested...

This is definitely not a very robust process.