DF - 2014-02-05

How does one use SSH (with pubkey). I've tried to do both, but having errors with or without the key.
-e "-i ~/.ssh/key.rsa" user@example.com:/destination/

They work fine on linux but on windows I get various errors. One for example from cygpath -e being an unknown parameter. I've tried various things such as escaping, and adding to the additional options but without luck