Convert DEM to .bil ????

Hi, All! Once again I'm stymied by this procedure. I have the DEM files from the GeoBase site, and using MICRODEM, am able to open them into a data base set, merging them into a map. However, I cannot find the option to convert to .bil. Previous instructions by Toripony said to open the Dem files, and Save as .bil. Another suggestion said to change the file names from .dem to .bil. Using Windows 7, I no longer find these option. Any suggestions as to what i need to do here? Cheers; Chuck F.