We've recently launched an add-on for WP All Import that supports importing to the Crocoblock JetEngine plugin. You can import to all of the meta fields and to Custom Content Types that are linked to a post type. This has been a highly requested add-on and we've decided to make it our debut public plugin as well.
For more than 15 years we have been using and developing with WordPress. A lot of cool things have been built behind the scenes in that time. But now it's time to take a more direct approach and offer plugins to the people directly. We have big plans for many more plugins this year. Our site is undergoing revolving updates currently. We rushed it initially so we could rapidly provide our customers with what they've been requesting - a way to import to JetEngine fields using the immensely powerful and well known WP All Import plugin.