Only way to update the Database is to get someone else to send you one, or get it from the Wiki. And the Wiki isn't reliable since they may make a typo in the wiki (or fix one made in the game) or miss other things.
Like if you swap between servers frequently for the quiz (like I did to build the database) you'll find that on the question about the Heretic's unique Mount, there are spaces after Ostrich. To a human, that means nothing. But to a computer that means EVERYTHING. And in European servers there is 1 more space than there are on American servers. So if you get the Europe version in your DB, next time you see the American version, you'll get it showing as wrong. And of course if you went to the Wiki, the extra spaces wouldn't be there at all, so you would get it wrong from that as well.