Hello Brian,
The easiest way to set the bridge type or configuration in LabVIEW is to use the DAQ Assistant Express VI. Select Analog Input=>Strain=>The channel you want to use and then you will be able to se the bridge configuration. Every time you double click on this Express VI you should be able to change this.
I am attaching a screenshot of what you are supposed to see.
Please let me know if I answered your questions.
Thanks,
LA