Hello,
In MAX you can change the current location of the Current IVI Configuration Store Location (file) by clicking the IVI Drivers tab in the configuration window (at the same level as devices and interfaces). The center pane will then populate with the Store information and you can click the Open IVI Configuration button to change the Current IVI Configuration Store Location; are you talking about selecting between IviConfigurationStore.xml and perhaps NIIVISimulationDrivers.xml... is that what you are looking to do?
Repost is you continue to have trouble!
Best Regards,
Jassem.