For .NET framework 4.0 projects, use instructions at Framework 2.0/Deployment.htm and use CuteEditor.dll under Framework 2.0\bin.
We have tested this DLL under .NET 4.0 and it works fine.
Hope it helps.
Keep me posted
asp.net Chat http://cutesoft.net/ASP.NET+Chat/default.aspx
Web Messenger: http://cutesoft.net/Web-Messenger/default.aspx
asp.net wysiwyg editor: http://cutesoft.net/ASP.NET+WYSIWYG+Editor/default.aspx
asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
Live Support: http://cutesoft.net/live-support/default.aspx