Sorry for the problems with the registration to download 3D models.
Just type in a 5 digit numeric code, regardless of what your postcode really
is. It's set for Germany postcodes and obviously won't take anything different.
The registration is a formality only, just so we know who is downloading and
where you are from. It doesn't matter if you are at an institution or a home
address, we just want to have an idea of who is using our webpage.
Hope this helps!