When I'm on the ARCHIPLUS Member content page, and I click the link to download the Surface Catalog, nothing downloads. It just takes me to the Help Page for the general information on "Create, Load, and Share Surfaces" (image attached for the page it take you to)
Try this: in ArchiCAD, go to Surface Settings, click on New..., select New from Catalog. At the bottom of the New Surface dialog box is a globe symbol, click on it and select Additional Surface Catalog for SSA Users... . This should take you to a web page that has the download link.
You should add a Signature to your Profile (click the Profile button near the top of this page) with your ArchiCAD version and operating system (see mine for an example) for more accurate help in this forum.