The URL is http://www.momentivity.com but you have to be a member for the download area. I originally installed the website in a subdirectory (www.momentivity.com/Site). Wpdm worked fine at that time. Later I used the procedures in the Codex: Giving WordPress Its Own Directory under the section Using a pre-existing subdirectory install. Now I can navigate to the category list area and see the list of downloads just fine, but when I click the name of a package it opens the wpdmpro blank page. The URL in the browser shows the subdirectory like this: www.momentivity.com/Site/file-download/mydocument/
. If I remove /Site from the URL address in the browser it then navigates correctly to the package page.