I wouldn’t recommend editing the config except in very special circumstances. Just use the “HB Dump Objects” component to write whatever objects you want to the appropriate subfolder in the following location:
C:\Users\[USERNAME]\ladybug_tools\resources\standards\honeybee_standards
As long as you add the JSON of the object to the correct subfolder for that object type, that object will be loaded into your standards library the next time you open Grasshopper.