Deleting firewall rules
If you create a Firewall Rule and decide later that you wish to change it, open the Application rules dialog in the Computer Protection Settings page. You can access Computer Protection Settings by clicking on Computer Protection to expand the dashboard, then clicking on Settings to the right of the Computer Protection heading.
This will open the settings dialog box, in the left hand menu, select Application rules.
Within the Application Rules dialog box, you will be presented with a list of all the programs that have been assigned Firewall Rules. If you wish to remove a rule, select the program, and click the Delete Selected Rule button.
The next time that program attempts to access the Internet, you will most likely be prompted with a new Firewall Alert prompt, which will allow you to create a new rule for the application.