By default, the Geospatial Administrator assigns the following: 

-ws specifies a configuration variable to be defined.    

-wr specifies the configuration variable _USTN_WORKSPACEROOT to define the location of the workspace root folder.

-wu specifies the user configuration.

Additional arugments can be appeneded as needed. For a full list of arguments, run the product executable in a Command window and append it with /?.   Note that each product and product version may have it's own variations of arguments.