I am a Kickstarter backer (upgraded during KS to beta access $90 level), I cannot get TITANS to run on Linux. A guy on Linux who just purchased TITANS says it runs, so it looks like you haven't added all the KS people into it?
What do you mean that it does "not run"? Is your Uber Account liamdawe? Looking at your account, it does have the TITANS grant on it. There was a slight delay after launch for the grants to work. Can you try again now? How are you trying to launch / update?
This is on Steam, when I say it doesn't run, it tells me I am running Classic PA, the quit and relaunch button does nothing but quit the game for me. Yeah my user is liamdawe.
Did you install "Planetary Annihilation: TITANS" in your Steam library? You have to install it manually, and it's a separate game.
