Thank you for the tipps. But at the indicated URL (http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows) are only updates for Acrobat prof 10.x or newer.
I bought CS4 Design Standard in 2010. That is only 4 jears ago. Adobe promised to give 5 jears of support. So why can't I get updates?
I guess the downloadable files at Download CS4 products are without updates, right?