This is a small bug fix release pertaining to saving files in CSV format. DataHarmonizer 1.9.0 failed to save CSV files with quotes around fields that had commas in them. This is fixed.
Technical note: CSV and TSV files are saved in UTF-8 character set. As such they do not require a byte order marker "BOM" leading character. Previous versions of DH were saving a BOM in CSV and TSV files but this is removed now for 1.9.1
No other changes to code are present so refer to PGP 5.6.0 for release notes.