How do I completely wipe my Blocked senders list?

During the wonderful months of getting spammed by [Removal of PII] I added numerous e-mail addresses to my Blocked senders list.  Now they are in my list doing nothing because it placed those addresses as [Removal of PII].  I want to get rid of them, but if I highlight them and click Remove from the list it does nothing.  I just want the entire list wiped out and I'll just start over from scratch, but when I try to do it myself it still leaves all of the examples above in my Blocked senders list.  Someone help me flush this mess out!