Etherdelta recently change website address and old address is down. Apparently some people didn't save their public keys and lost some funds. I will show you how to restore them in your browser.

Chrome

Open website https://etherdelta.github.io/
Press F12 key or right click on site and choose inspect to open developer tools. You can adjust width of the panel.
On the top of the panel choose Application
On the left side choose Local Storage > Etherdelta
In the Key field choose etherdelta then double click on the Value side and copy all the text inside.
Paste it to notepad: only first 2 lines are usefull for you.
You have your address in first line and private key in second, copy it and use in new etherdelta/myetherwallet/whatever you like. Voila!

Open website https://etherdelta.github.io/
Press F12 key or right click on site and choose inspect to open developer tools.
On the top of the panel choose Data then on the left side choose Local Storage > Etherdelta
In the Key field choose value then double click and copy all the text inside.
Paste it to notepad: only first 2 lines are usefull for you.
You have your address in first line and private key in second, copy it and use in new etherdelta/myetherwallet/whatever you like. Voila!

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If you like my job you can donate: my eth address: 0xefe61da135dcc0195b22d3d3915f9148befbf44d