Seems the 1.1 patch is out for the retail edition now also, judging by that trainer list it seems the Steam edition was pretty frequently updated until recently.
Haven't found a way to see version information so I can't tell what exact build this is unfortunately but there it is incase there's any plans to update the trainer further for the retail version.
EDIT: Heh it was part of the file-name 3709
(Labeled as German on the site for some reason but it's likely inaccurate.)
[Edited by LordJB, 6/8/2011 7:58:14 AM]
EDIT: Updates the English version but does also support the German edition of the game with some localization specific fixes in addition to a number of bugfixes and enhancements.
[Edited by LordJB, 6/8/2011 8:02:47 AM]
i just installed the game from scratch on steam and tested the latest current trainer.
the trainer works
[Edited by Caliber, 6/8/2015 10:46:08 AM]
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem
• Add Rage Points