We have posted an updated installer for customers who received their copy of X3: Terran Conflict via online distribution (e.g. gamesload) and do not have a DVD.
If you own such a version, please get the update from the download page.
This version is identical to the previously available update. There is no need to re-download if you already have updated your DVD version to 1.2. Once again however this update is not meant for Steam users! The Steam client will automatically update your game with the correct files.