The v1.5 version was uploaded on the spleen but it was later removed by the site’s administrator. That version would have only 3 audio tracks–1 English stereo track, 1 English mono track, and 1 Spanish stero track. Perhaps you might be confusing the audio tracks with the subtitles that include English, Spanish, French, German, Italian & Finnish.
Anyway, an updated version, v1.6, is now available. The audio tracks here are the same as the ones from v1.5. If you wish to listen to the German audio track with this version, you would have to mux the German audio mix from Harmy’s Star Wars Despecialized version to the v1.6.