How do I update product in the new Seller Center?
Products can be updated in the exact same way in the new Seller Center - in the "Manage Products" overview, with the mass update file or via API.
Follow these steps to mass update products:
Step 1: Click on "Products"
Step 2: Go to "Manage Products"
Step 3: Click "Export'
Step 4: Download the category of products from the drop-down list and you can start to update the template. Which is the same when you do a mass upload product.