The physical file does not reside on the user club website. Instead you have to download the file from the official Roland Keyboard Club website. You find more information here:

http://www.rolandkeyboardclub.com/v/g70_db_manager.php

Download the file using this hyperlink (PC user):
http://www.rolandkeyboardclub.com/v/g70/WIN/G-70DatabaseManager.zip

Download the file using this hyperlink (MAC user):
http://www.rolandkeyboardclub.com/v/g70/MAC/G-70DatabaseManager.dmg