If you know the version of a WordPress site, you also know about known security vulnerabilities with little effort. WordPress automatically adds the version number to RSS feeds (and other pages), making it easy for hackers to exploit security vulnerabilities on your site.
With RSS Chimp Pro you can hide the WordPress version number from all feeds to make your site a little more secure. In the backend navigate to the settings page of RSS Chimp Pro, you find the option to hide the version number in the tab General under Other options. Just tick the box and save the settings page.