Hi skrishguru,
If the demo works for you, please download the latest version and try again.
Latest version downloads: http://www.cutesoft.net/downloads/folders/21904/download.aspx
Also, you can try this way
1. Open file "\CuteSoft_Client\CuteEditor\Template.aspx "
2. Find section below and delete it
<link type="text/css" rel="stylesheet" href='<%=CuteEditor.EditorUtility.ProcessWebPath(Context,Page,"Load.ashx?type=style&file=SyntaxHighlighter.css")%>' />
Regards,
ken