We use module version 1.0.7. We tried to export the CSV file, enter the SKU on the column fbt_skus, save and then import.
We could import it but not see the imported Frequently Bought Together products on the product page.
Please check and fix the issue.
To solve the issue, we have edited this file app/code/Bss/FBT/Model/CatalogImportExport/Import/Product.php
Please chekc and apply the attachment on the site.
If you need any further support, please feel free to contact us.
We'd like to help.