adobe digital editions 4.0

On the Adobe website I read that Windows 7 works with adobe digital editions 4.0.

(see https://helpx.adobe.com/digital-editions/kb/install-digital-editions-windows-7.html)

But I can't find where I can download ADE 4.0 from the Adobe-site.

Can you give me the url for ADE 4.0?

Thanks, Robin