Were you able to find the section of Wireshare props to add the addresses and did this work?

It has crossed my mind that your problem is a system permissions issue. You could try right-clicking the Wireshare program or shortcut and get Properties. Set Wireshare to 'Run as Administrator'. Only do this after WireShare has stopped running. I don't know if this will fix the problem of adding hosts to the blacklist but something worth trying.