Move shopp to another site?

I’m building a site for a client who is running Shopp on their existing site. They have a long standing (paid) account with you, although I’m yet to receive login details, so I’m posting in free support for now.

My question:

How do I move the existing Shopp data into the new site I’m building. I’m not so fussed about products (there are only a dozen or so), it’s more about moving the ‘orders’ and ‘customers’ information. Shopp clearly has the ability to export this information, although there’s no import functionality built in by the looks of it?

Thanks.

Note: Both sites are running the same version of Shopp.

https://wordpress.org/plugins/shopp/