The RXF Import Wizard file page allows you to choose the data file you wish to import. See the following image.
Click the 
button to launch the following dialog.
Use the drop arrow to browse your way to the directory containing the RXF file you wish to import and select it. The name of the file will appear in the "File name" field. Click the "Open" button to return to the previous screen. Your RXF file name and the directory it is stored in should now be displayed in the "Source file" field. See the following image.
If you are satisfied you have selected the correct file to import into your database, click the "Next" button to move to the Select page.