on that site i see among of other stardock products i purchased in the past also "DesktopX 2 Professional LX". Moving the mouse over the download button shows me DesktopX35_professional.exe. But pressing the download button shows me a page with "The page you requested was not found".
So download of DesktopX 3.5 does not work. But anyway i managed that by using an old download link from an license recovery email.
But where can i download the DesktopXPro 4beta. I remember that SDC or impulse - do not know which one - showed me all my registered products and let me download beta of DesktopX 4.