Looking here It would appear that there are specific 64bit versions of NI assemblies
http://zone.ni.com/reference/en-XX/help/375857A-01/xml/netdeploymentfiles/
I am not able to find Program Files\National Instruments\MeasurementStudioVS2013 and I am probably missing something simple, but I do not see an option in the NI measurment studio installer to install deployment files in this location... I am converting a 32bit application to 64bit and I am unable to run it due to a badimageformat exception caused by NationalInstruments.Analysis.Professional.dll
What am I missing here? How do I find the 64bit versions of the NI libraries?