Hello, Dennis Morris,
Thank you for contacting us and for using XStore.
Default WooCommerce import you can do via Products > Import > Choose a CSV file from your computer and click on Continue.
If you want to use an additional plugin for the import, check the documentation of the plugin first. We did not know about compatibility problems with WP Import/Export Pro from other our customers.
“it does not seem to work with this theme” – please check if it works when the default WooCommerce theme – Storefront is activated on your site.
Let us know the result.
Thank you for your cooperation and we look forward to hearing from you soon.
Kind Regards,
8theme team