CB Subs _ Joomla

Do you know anything about CB Subs? My client has a huge site where we have exported the membership database but it is missing the expiration dates of the membership levels. I need to set up a field in the CB Subs that shows the expiration dates and a way to export the info when we need it. I need to have the membership information extracted into an excel database file (.csv) that include all membership data. We extracted one file but it is missing the CB_Expire field I'm attaching it for your reference.