By default, the DGN WorkSet files (.dgnws) are stored in the root folder of the WorkSet. If you want to move this file to another location, so as to separate the location of your design data (DGN) and configuration data, you can use the _USTN_WORKSETSDGNWSROOT configuration variable. This configuration variable defines the location of DGNWS files of all the WorkSets in a WorkSpace. This configuration variable should be defined in the WorkSpace's .cfg file.