The biggest thing which you will see immediately is that the DAQ drivers are completely different. In LV 5 they were called NI-DAQ and now they are DAQmx. There is no direct one-to-one correspondence, so the data acquisition parts of the program will need to be modified.
How difficult that will be depends very much on how the program was originally written and how well it was documented.
In addition many improvements have been made to LV, such as the event structure. It may be worth the time it takes to rewrite the entire program. Key factors in the decision to rewrite include: How well is the original program documented or understood? Does it have a structure which is easily modified (for example a state machine)? Does it have things which good practice would now avoid (sequence structures, local variables rather than wires, oversized diagram with few subVIs)? Is there a requirement to modify the functionality or add capability to the program?
Lynn
