Right on, glad to hear the urge to build has found you once again . The saves have been moved into My documents, my games, Terratech, and then a folder with a long number on it. Within the folder are all your saves, screenshots and snapshots. Hope it helps! Have a good one [8D)
Do you mean the techs from Seth_Seth's last showcase? If so there where two that wouldn't load for me either while the other three worked fine.
Or are you unable to load any of them?
There has been some issues with saves not loading and it may be causing problems with the snapshots as well, but that is just a guess.
Hopefully things get figured out quickly.
Have a good one [8D)