The language packs are not a full versions. If you already installed the English version, then copy (replace) the language pack files into the program installation directory:
- https://downloads.solarwinds.com/solarwinds/Release/DameWare/v12.1.0/lang/german/CentralServerDE.zip
- https://downloads.solarwinds.com/solarwinds/Release/DameWare/v12.1.0/lang/german/DRSDE.zip
- https://downloads.solarwinds.com/solarwinds/Release/DameWare/v12.1.0/lang/german/MRC32DE.zip
- https://downloads.solarwinds.com/solarwinds/Release/DameWare/v12.1.0/lang/german/MRC64DE.zip