What I would do is create a config file using the standard XML format. This would be originally created from a TypeDef cluster containing all variables (this is also a good idea because it is expandable if required). LabVIEW contains XML subVis which can be used for this config.xml file. Make sure you specify labels for each element in the TypeDef cluster, as they are required in the XML file.
I would start by creating a VI, which won't be used in your main program, to manually write a cluster (as mentioned previously) to a new XML file. Then in the initialization stage of your main program, read the xml file and convert it to usable data by providing the cluster TypeDef as the data type.
The good thing about XML files is that it's just text, so it is manually customizable outside of LabVIEW if required.