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Maybe you don’t know that, but WooCommerce has an inbuilt functionality for importing and exporting products from CSV/XML files. Therefore, most of the times, you don’t need a premium import/export plugin.
Simply go to WordPress Dashboard > Products > All Products and click on Import (or Export) and follow the instructions. That’s it!
This is a new functionality introduced since WooCommerce 3.0 and it’s working like a charm.
For more advanced import/export, automatic updates from server and more complex functionalities, take a look at WP All Import + WooCommerce Add-On