First install updated dashboard

kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.0.0/aio/deploy/recommended.yaml

Then start the dashboard

kubectl proxy

And finally, use a browser to open up the dashboard

http://localhost:8001/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/

I just use the kubeconfig file in my ~/.kube/config directory (or c:\users\my_username\.kube\config)