This may help: check the Registry at
HKEY_CLASSES_ROOT\CLSID\{00021400-0000-0000-C000-000000000046}\shellex\ExtShellFolderViews\{5984FFE0-28D4-11CF-AE66-08002B2E1262}\PersistMoniker
The value data for this value name has to be
file://%userappdata%\Microsoft\Internet Explorer\Desktop.htt