The software appears to be available, but there is nothing about it on the official website. If you still have it installed, then I recommend checking the built-in Help to see the correct procedure of adding a member's address correctly. If the software doesn't provide a help section, then I recommend checking the installation directory where you might find user guides and help files in PDF or CHM format. Developers have this habit or placing help files in the installation directory due to various reasons.
I've also checked the info on the official website, but there is nothing about your issue.