Hi Josete,
you can download the latest version which is 7.5. Take this into account:
"Traditional NI-DAQ (Legacy) for PC Compatibles, version 7.5 for Windows Vista/7/8 32-bit. 64-bit versions of Windows are not supported.
Traditional NI-DAQ (Legacy) is an older driver with outdated APIs for developing data acquisition, instrumentation, and control applications for older National Instruments DAQ devices. Traditional NI-DAQ (Legacy) has the same VIs and functions and works the same way as NI-DAQ 6.9.3."
Good luck,
Jesús