Hi there,
I believe you only need the single quotes if you are dealing with spaces in the filepath/ file name. Try:
scp developer@198.18.133.48:"/home/developer/.kube/config" $HOME\.kube\config
Arguably since there are no spaces in the path the double quotes could be removed:
scp developer@198.18.133.48:/home/developer/.kube/config $HOME\.kube\config
cheers,
Seb.