Dale;
That is happening because you probably installed the new version of NI-DAQ on the top of the old one, without uninstalling it first. Now, you will need to uninstall everything, clean the windows registry entries up, and install NI-DAQ 6.9.1 from scratch.
To unsitall the driver, go to Add/Remove programs, and to clean up the registry, type RegEdit in Start->Run, and go to HKWY_LOCAL_MACHINE->Software->National Instruments, and delete the NI-DAQ folders, if they are still there after you unistall everything.
Hope this helps.
Filipe