When there's a freshy new game version release, such as now with .18 version, the updater, although marked as recommended to be launched at the end of the client installation process, should not be launched.
It seems, though, that you were fortunate enough as for it not starting replacing your new files with elder ones. The mirrors haven't been updated to the latest game version, and that might have caused you trouble.
Simply ensure that the game you launch is planeshift crystal blue version 0.3.018, and don't worry about the naming "tech demo", that's just a reminder about it being an incomplete game, but don't think there's a "more complete version, non demo" somewhere.