Guide to Install
The Patch for uncensoring the game is available, but not shown on Steam (in my case the German version).
So use a browser and look on this page:
In the upper right, you find an “Install” button. If you push that, the page tries to install this DLC – maybe you will be asked, which program you want to use (Answer is Steam, of course).
After that, the patch should be shown in the DLC – Sector of the game in your library.