Question Download Janus WinForms Components

Please don't resurrect a thread that is 17 years old, especially when your post doesn't relate directly to the subject of that thread. Your post has been moved to its own thread.
As for your question, I just typed "download janus for windows forms" into a search engine and got a number of results that seem relevant. That said, the first result was for the Windows Marketplace and that led to the page you linked to, which is not working, as you said. That suggests that, even if you can download the desired components, you'll only be able to use the trial version and not be able to activate the full version even if you have a license.
You could look at the internet archive information for this site. Wayback Machine

Perhaps when they were winding down, they gave out their suite. It may be worth some time looking through.