Please note that we do not provide support for third-party software like MyEtherWallet. Please talk to their team for any questions.
You don’t need to send your coins from your Portfolio to MyEtherWallet, you just open MyEtherWallet using your private key 🙂
First, make sure that you are using the official site:
You may wish to consider running MyEtherWallet locally for full security: https://myetherwallet.github.io/knowledge-base/offline/running-myetherwallet-locally.html
To send your Ethereum using MyEtherWallet, click on Send Ether & Tokens in the top bar, and choose to log in with Private key. Paste the private key from your Portfolio in the box on the right.
Once you’re logged in, you can add an address to send to, and send your Ethereum: