I've moved my website and the buy product link has not changed

Hi Florian,

You will have to re-import the products, unfortunately, but this can be easily done by copy-pasting their ASIN codes from Your current product(s) ASIN

http://support.aa-team.com/user_uploads/Capture2.JPG

And then use the CSV Bulk Import feature in order to reimport them: http://docs.aa-team.com/woocommerce-amazon-affiliates/documentation/csv-bulk-import/