Password protection added to pages

My client is using this plugin along with several others. I did an update to this single plugin and all of a sudden several pages (that happen to be products) became password protected without any change to them other than this plugin being updated. What is causing this? If you are unsure, how do I get the previous version of this plugin so I can revert back until this conflict is resolved in future updates?

The page I need help with: [log in to see the link]