JonE,
Please following the steps below:
1. Remove the CuteEditor.dll reference from your solution.
2. Add the reference of new CuteEditor.dll to your solution.
3. Remove the old client files from your solution.
4. Add the new client files to your solution.
Recompile your project then try again.
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