The File menu has the following options.

The File, then Load Settings from File operation initializes the Export to RiverWISE fields from an existing WISE file. When this operation is initiated, RiverWare opens a file chooser dialog in which you can specify an existing WISE file. Once a WISE file has been specified, RiverWare extracts information from that file and uses it to initializes the fields of the dialog to their values when the selected file was exported.

The File, then Open RiverWISE operation opens RiverWISE as a separate process.