This is the solution :
1. Open the following file: CuteSoft_Client/CuteEditor/Configuration/Shared/Common.config
2. Remove all the example code which points to CuteSoft site. For example, remove this: <html><![CDATA[<img border=0 align='absMiddle' src='http://cutesoft.net/data/signature.gif' /> CuteSoft]]></html>
Thanks for CuteSoft support.