This plugin helps you manage your search engine duplicate content, by setting your post page's canonical to the permalink.
You can override the canonical URL of each post or page, by specifying the URL in the "SEO No Duplicate" box on your post edit page.
Please take a look at documentation available on the plugin page to see if any of them can help you. If not, feel free to post your issues on the appropriate plugin support forum. I will try my best to help you resolve any issues that you are having.