Hello, I just did a test import of serial numbers (99) on WooCommerce Serial Numbers. when I select them all and perform a bulk delete, nothing happens. Only manually deleting each one by one work.
Thanks for informing us about the problem. We are aware of this problem and already offered the fix. Please delete the existing free version and reinstall it. This should fix your problem with bulk delete. Download the latest version from WordPress.org or follow this link. In case of further problems, please report back to us. Thank you very much.