How to export Multiterm to XML

I would like to export the Multiterm termbase to an XML file. Well, this seemed simple at first glance, but I am struggling already a couple of hours with the API.
Could it be that the SDK description is a bit outdated? On the community page, I found that the TMO interop is deprecated (http://community.sdl.com/phase_2_groups/sdl_openexchange_developers/f/57/t/1134.aspx).
Does someone have a piece of sample code how to open an .sdltb file and export the content to XML?
Thank you so much,
Henk