It says the Nsaka Hindenburg Basic is free but when I click to download it asks for email and registration key. What do I do?
I have checked what you're saying and indeed, the download form requires a key. They say this key is provided to your email address after you have purchased a Hindeburg product. The software might be free to install and use, but only after you have purchased another product.
Note: Contact the developers and they should provide additional information about this.
