Have you looked at your Scrivener options to see if “Enable additional substitutions” is checked (File / Options / Corrections )? If they are enabled, click the “Edit Substitutions” button and check the list.
Substitutions are stored in the Windows registry (and not in a human readable format (see this message thread ) and are removed if you uninstall Scrivener. You have to save the program options (preferences) under File / Options / Manage… to keep from losing them between installations.