I hope everything is right, maybe someone can check it.
Corrected some mistakes and added missing parts.
Here is the german language file for 1.6.0
P.S.: Found a mistake in the english file->
instead of
define("SETUPLOADFOLDER_ERROR","Kein Verzeichnis verfügbar! Bitte erst Upload Verzeichnis einstellen.");
it has to be
define("SETUPLOADFOLDER_ERROR","This upload folder doesn t exist. Set up the upload folder.");