When your data was loaded, I also did the same experience.
However, it is strange that the story progresses satisfactorily in case of the latest German version.
Then, I suggest one solution.
Once install the German version (DE 1.1.0.5), then load save data. If it does so, Calisto will approach you. Then, before he talks with you, save a game.
After it is successful, load the save data with an English version (1.0.9.1). When I tried this method, I progressed well.
When you install the German version, it is not necessary to uninstall the English version.
Probably, it is good to rename the current En Nehrim folder (e.g. 'Nehrim_En'), when you install the DE version.