Hello,
Since the DAQ device that you are using is not a National Instruments product, you will have to contact I/O Tech and request the drivers and the LabVIEW support files so that you can call the board directly from LabVIEW.
Regarding the FFTs, you should not have any problems programming your application using analysis VI's, even though the LabVIEW software that you are using is an evaluation version.
Good luck with your application!