Sorry, but I am finding that a "bit too vague".
I will assume that you are referring to the Web based Download Station (which has a link at the top of this page).
If you are attempting to download assets from the Web based Download Station then you should be aware that this uses the FTP download system which has now been blocked, for very good security reasons, by all the major browsers (including Chrome). This block applies to all the categories on the download station, not just to the building category.
You should be using content manager for all your downloads.