The web part of the german compendium, including the link to the download is outdated and still on Version 3.0 of the compendium.

https://www.gpg4win.de/doc/de/gpg4win-compendium.html

Please update it somehow, even if that means that you have to build the HTML Version of the compendium on some Lenny system.
The download link inside the compendium should be updated to a direct download of the pdf file instead of linking to the confusing wald page.