Network - Unable To View/access Nas

I have been on the road a while and when I returned home I have discovered the BitDefender is now blocking access to three NASs on my sub-net.

All the computers are running Windows 8.1 Pro or Windows 7 Pro.

All were seeing the NASs prior to the latest BD updates.

It doesn't appear to make any sense that in a Trusted or Home Office sub net to block IP addresses/ports in a general manner.