Hi Dean,
Yeah I’m afraid we can only offer very limited support for third party plugins such as the one I think you’re referring to.
What I can say is that it’s quite possible to use the “official” WP import/export tools to push and pull event data out of WordPress installations and that uses XML as the intermediary format. So, it’s definitely possible to do this, if only by studying the XML import/export format used by WordPress’s own importer/exporter and cooking something up that way.
I’m afraid there’s little else we can offer at this time.