You can unblock this by opening the CIS GUI select Firewall, Advanced, Network Security Policy.
Now you have to find the specific application in the policy.
Once you have found it you can decide to remove the existing rule to start all over again, or you can select a predefined rule like “Outgoing Only” to do this you have to double click on the application name rule and it will open “Application Network Access Control” window where you can tweak your settings.
If you wish to “delete” the settings for this application simply select it and press the ‘Remove’ button and after that ‘Apply’ the policy. Once that’s done start the application again and CIS should start to alert you for it so you can chose an action of your liking.