Is there an easy way of migrating all my e-newsletter data.

Hi,

Is there an easy way of migrating all my e-newsletter data.

I am moving my root site to be a subsite (for operational reasons, with the benefit of hindsite I would have never made the root site a functional site but just a placeholder site)

But my root site has lots of enewsletter data. Is there a simple way to export and reload everything? I see it isn't and item on WP Export so I assume we have custom tables rather than custom post types but I guess loads of options too.

Maybe best to resort to exporting subscribed users and manually setup the rest?