I realize now that you'd posted info that there would be an update here, however, I don't check the forums everyday & once I did the release notes promise the game would only be down for a few minutes. This meant that I was playing the game when it updated without warning. I waited almost an hour waiting for the game to come back up so I could set up longer production times before I went to bed. I wasn't able to get in, so now I'm short on production points & materials. Very frustrating.
What would help immensely is if you were to use your pop-up message system that you're using today to tell us about potential issue with the tech tree, to give a warning before an update. Even if you only expect the game to be offline for a few minutes, we all know things don't always go as planned. An advanced warning "we will be updating the game at xx:xx, please be aware the game will be unavailable during this time" would be a very useful courtesy.