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Can I change the look and feel by adapting CSS

Yes, you can. Take a look at the 'sspdc.css' file. You can override the classes in you themes' CSS file.

The plugin seems to work but my Director album dropdown list is empty

The DirectorPHP API relies on phpcurl for communicating with Director. Connector won't work without it and checks if phpcurl is available and gives instructions. Have a look at your plugin configuration page.