I downloaded CWS data in May. I want to add more data and can’t find CWS (supplement) on Select Data page. Did you remove CWS?
From the “Select Samples” page you will need to navigate to the “Supplement Topics” tab on the far-right to see samples organized by supplement topic. From this page, I see CWS listed for May 2017 as well as February 1995, 1997, 1999, 2001, and 2005.