Problem downloading Natural

I’m new to Natural-Adabas. I’ve seen that I can download Adabas and Natural Community Editions for Windows XP Pro.
No problems downloading and installing Adabas, but when I try to download Natural, the email that I receive gives me an url that says:

If you download that file, it is not 183MB big, it is 1.41GB!!!, and it installs NaturalONE and other things. It is very similar (but not equal) to the file that you get if you request the NaturalONE download.
How can I get the Natural Community environment for Windows (not NaturalONE) in order to follow the “first steps” guide and the “programming guide”?

Thanks in advance for your help,