From time to time, users of RSS Chimp get the opportunity to pre-test new versions of the plugin. You can join the beta program in the plugin settings on any WordPress site where RSS Chimp is activated with a valid license.
How to join the beta program
Navigate to the settings page of RSS Chimp in the backend of your WordPress site. If you have activated RSS Chimp (Free or Pro) you find an option to join the beta program in the Account tab. After ticking the box you get notified when a new beta release is available on the page were you update all the plugins in WordPress.