Blocked intrusions and white listing them

Is there any way to unblock blocked intrusions on firewall events and defense+ events. I am getting trusted programs blocked a lot by defense +.Is the only way to add it to trusted files? It would be good if the log entry could be right clicked and add to trusted files an option

Also in firewall events It says windows operating system was blocked source destination Protocol ARP. what does this mean?. This address refers to this laptop. Blocked from connecting to itself?

Sometimes, new files are sandboxed and i click do not isolate it again- is that the wording-? and it somtimes will be isolated again the next time

Comodo 7.0.317799.4142
Auto Sandbox untrusted
HIPS safe mode