Import Data - FrameMarket and MarketPress

I have installed the FrameMarket theme and MarketPress plugin but am unable to import data for the plugin due to this error "It appears you have no products from WP e-Commerce to import. Check that the plugin is updated to the latest version (the importer only works with >3.8)."

I am trying to import the data so I can style the website the same way the FrameMarket demo site looks but the data won't import so I am struggling to understand how the plugin works.

I checked out your forum and manuals but neither seemed to have the answer.

Thanks in advance for your help

Dan