We haven't changed anything whatsoever in any latest version that could have affected this. There can only be two explanations:
1) You still haven't configured everything properly
2) There was some change in your server/network configuration
It appears that the client cannot establish a connection with the naming service. The naming service is running on the server and the client tries to find the service using the line in the BASServer.props file:
serverName:1099
So it must be one of the two - either the server name is incorrect or there is some problem communicating with port 1099 through your network. Can you run the Configuration Tool from the server machine?