Unfortunately, I cannot open the archive - it tells me it is not a valid archive. (cannot open file. it does not appear to be a valid archive. Press F1 for help) I have WinZip and WinRar installed.
Uh, it did in fact download something - so I had a look at the UseSql.aspx and found what was missing - just three lines:
youreditorid.Setting("CuteEditorFileStorageType") = GetType(SqlFileStorage).AssemblyQualifiedName
youreditorid.Setting("DownFile") = ResolveUrl("DownFile.Aspx")
youreditorid.SetSecurityGalleryPath(
"/")
Add these lines in the Page_Load of the page using the editor - then it is working!
Thanks for your help.