Petra,
Please open CuteSoft_Client\CuteEditor\Dialogs\SelectFile.aspx and change the following code:
fs.VirtualRoot=CuteEditor.EditorUtility.ProcessWebPath(Context,null,secset.FilesGalleryPath).TrimEnd('/')+"/";
to:
fs.VirtualRoot=CuteEditor.EditorUtility.ProcessWebPath(Context,null,"/")+"/";
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asp wysiwyg html editor: http://cutesoft.net/ASP
asp.net Image Gallery: http://cutesoft.net/ASP.NET+Image+Gallery/default.aspx
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