data engine V.i is a tollbox to use fuzzy logic with LabView,sold by M.T.I., not by National Instruments. If you want you can go to the web site to take more informations about it functionalities: http://www.dataengine.de/english/vi/index.htm
Now, I'm using the Data Engine V.i 2.0.1, but the version Data Engine V.i 4.0 is disponible since July.