I haven't tested it. It is old software for the ADF4350 board but the ADF4351 is very similar.
See can you find the PID variable in the LabVIEW project. Try changing this from 0xB403 to 0xB40D. (0xB403 is the ID for the ADF4350 board. 0xB40D is the ID for the ADF4351 board.)