There is no additional plugin required. From your screenshot it looks like there is possibly either a third-party plugin or some custom CSS that is changing the products layout, but it is impossible to say without seeing the website.
Please let me know your site URL and I’ll be able to take a look and advise further. It will only take me a few seconds and I should be able to see why this issue is occurring.
If you don’t want to post your URL here, then please activate your license key and I can then take a look.