If you look just a little lower on this page, you will see a "Contact Us" link, which will take you to a page with the information for Bentley Corporate Headquarters:
Corporate Headquarters
Bentley Systems, Incorporated
685 Stockton Drive
Exton, PA 19341, United States
1-800-BENTLEY (1 800 236 8539)
Outside the United States
+1 610 458 5000
Beyond that, for Import/Export information, I believe that LandXML is something of a standard to communicate geometry between software packages. More information can be found at:
MaryB