Application change
The firewall has detected a modification in an application which is used to establish outgoing connections from your computer. It is possible that the application has simply been updated to a new version. On the other hand, a modification can be caused by a malicious application. If you are not aware of any legitimate modification, we recommend that you deny the connection and scan your computer using the most recent version of detection engine. If you are sure of any modification and allow the communication with selected Automatically allow modifications of this application check box, the rule applied for this application will be retained.