Please refer to file \CuteSoft_Client\CuteEditor\Dialogs\InsertTemplate.aspx,  you can find

<asp:ImageButton id="NewTemplate" BorderWidth="1" Runat="server" AlternateText="[[NewTemplate]]"
       ImageUrl="../Load.ashx?type=image&file=newtemplate.gif" OnClick="NewTemplate_Click" />

Call  "NewTemplate_Click" , it will pop up creating template dialog

 

Regards,

Eric