I just downloaded and installed this plugin and after testing it thoroughly for an entire day, of different environments and WordPress installations, I must say it is completely useless.
It does not create any additional fields in posts/pages, nor does it automatically generate any kind of Dublin Core metas.
What it does do, instead, is a whole lot of other completely useless things that nobody could possibly need, like for example it allows me to use a shortcode to display Dublin Code IN the page itself, like a text. Also it allows me to do other things, like this option for "Content to modify page / post with (before post content)".
Don't bother using this, it is a waste of time, a completely useless and irrelevant plugin that does many things except generating Dublin Core metas.