aaron,
The reason of this issue is very simple:
Your DLL version doesn't match the client files.
Open CuteSoft_Client\CuteEditor\Themes\Custom\Images\all.png. This long and narrow image contains all toolbar images. The information about how to get the correct image this long and narrow is defined in the DLL.
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