What about andvanced tech on an empty planet?

[Jeb]

To get the advanced tech, you need to found a colony on the planet or moon with the "stonehenge" symbol. Were the planets the right kind for your colony ships (i.e. not ice planets for rock colony ships, etc.)?

If the colony did get founded but you didn't get any tech, then you're probably using the new demo (Version 0.56 instead of 0.51). In the old demo, you pretty much always got something, but in the new demo sometimes you don't. I'm not exactly sure why, but I suspect that the planets are now "seeded" at the start of the game with specific techs, and that if you already have the tech the planet is supposed to give you, nothing happens.