Unique tech from ruins

[douglas]

This happens because the random seed is not saved, but is always the same just after you load a game. To get another set of techs from the ruins, just do something that uses the random number generator, like simulating a battle, and then colonize the planet. If you really feel like cheating, just keep reloading and simulating two colony ships running away from each other a different number of times until you get a colonization tech.