Hi Markus,
Greetings from the ShepHertz!!!!
You can download the SDK from this link and while downloading it will ask you enter the emaiID, So please enter your correct emaiID and submit. It will download the required SDK.
In case if you have any other queries please do feel free to reach out to us.
We will be happy to help you.
Regards,
Priyanka Singh
app42 Team