ChangeDefaultExchangeConvention.cs

//define new convention
Configure.Conventions.RabbitMq(c => c.ExchangeNameForPubSub((a, t) => a.Queue));

//create the exchanges as needed
public class ExchangeInstaller:INeedToInstallSomething<Windows>
{
    public IManageRabbitMqConnections ConnectionManager { get; set; }

    public void Install(string identity)
    {
        using (var channel = ConnectionManager.GetConnection(ConnectionPurpose.Administration, "create exchange").CreateModel())
        {
            channel.ExchangeDeclare(Address.Local.Queue,"topic",true);
        }
    }
}