Kappfinder installation issue

Hello,
I'using Kubuntu 8.04 and I have just installed the Klik client, necessary for the kappfinder installation, but when I go to http://kappfinder.klik.atekon.de/ and click its download and run hyperlink at the bottom of the page, I obtain a dialog box where Kunbuntu asks me for the application it as to use to open it (!?). It is just a download and I don't know what application is involved, so the download is not performed.
How can I install it? Can you give me some advice?
Best Regards