Bitdefender Blocking LAN Network

I have been using Input Director to control mouse & keyboard on 3 PCs. It has always worked brilliantly but since the last Bitdefender Update the PCs cannot see each other on the Network and the only way to get a reconnection is by disabling the firewall on all 3 PCs. Input Director has been excluded on the Firewall and the Antivirus, it appears that BitDefender is ignoring the rules. I'm rather disappointed and would appreciate some help on this issue. So that I don't get basic questions back my Network is working perfectly fine with each PC having a different Host name and individual static IPs, and with relevant full sharing permissions.