Press Control + F to launch the find window. Search for “Creative Cloud Files”, uncheck the Keys and Values boxes and click Find Next. The first result should be within a directory that begins with HKEY_CLASSES_ROOT\CLSID. Below is a screenshot of what it looks like. If you do not see this screen, keep pushing the F3 key until you find it.
Once you’ve located the directory, look for a DWORD value on the right named System.IsPinnedToNameSpaceTree.
Double click it and change the “Value data” from 1 to 0. Finally, click OK to save the new value.