Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Recent Files
PREF_FILE_RECENT
Parameter: Backup Copies
PREF_FILE_BACKUP
Parameter: Link Assets
PREF_FILE_ASSETS_LINK
Parameter: Save
PREF_FILE_AUTOEVERY
Parameter: Every (min)
PREF_FILE_AUTOMIN
Parameter: Limit
PREF_FILE_AUTOLIMIT
Parameter: To (Copies)
PREF_FILE_AUTOCOPIES
Parameter: Save to Folder
PREF_FILE_AUTOSAVETO
Parameter: Deferred Refresh on Open
ID_FILES_XREFPREFS_DEFERRED_LOAD
Parameter: Reduced References on Save
ID_FILES_XREFPREFS_REDUCED_SAVE
Parameter: Paths
PREF_FILE_TEXPATHS
Parameter: Paths as Watch Folders
PREF_WATCHFOLDER_AUTOMOUNT_SEARCHPATHS