Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Recent Files
PREF_FILE_RECENTParameter: Backup Copies
PREF_FILE_BACKUPParameter: Link Assets
PREF_FILE_ASSETS_LINKParameter: Save
PREF_FILE_AUTOEVERYParameter: Every (min)
PREF_FILE_AUTOMINParameter: Limit
PREF_FILE_AUTOLIMITParameter: To (Copies)
PREF_FILE_AUTOCOPIESParameter: Save to Folder
PREF_FILE_AUTOSAVETOParameter: Deferred Refresh on Open
ID_FILES_XREFPREFS_DEFERRED_LOADParameter: Reduced References on Save
ID_FILES_XREFPREFS_REDUCED_SAVEParameter: Paths
PREF_FILE_TEXPATHSParameter: Paths as Watch Folders
PREF_WATCHFOLDER_AUTOMOUNT_SEARCHPATHSParameter: Default Scene
PREF_DEFAULT_SCENE