Okay, now I am totally confused... I somehow managed to get a backup save file back to life, so now I have all the save back I lost a month ago
But still no Goat Glade... however I managed to get the EE edition to run in a way, that the base game is not influenced, so now I have a base game with Goat Glade and my EE save file back with all quests done
So I am done for now, but I am still confused^^