What version of the Bluebook does Citrus support?
https://www.correctcite.com/about.html says that the Citrus Bluebook citation software for automated legal citations is now compatible with the 19th edition of The Bluebook.
Citrus conforms to the Bluebook rules in the 18th edition of The Bluebook: A Uniform System of Citation, 3d printing. However, Citrus will add support for the latest rule changes as new printings or versions of the Bluebook become available. When that happens, Citrus will automatically correct the Bluebook citations in your documents so that you do not need to worry about keeping up with arcane rule changes.