Download the terrain data to your local computer.

To execute via batch file:

   >set CLASSPATH="lib/WALSAIP-VTE-Core.jar;lib/WALSAIP-VTE-SWING.jar;lib/jogl.jar;lib/gluegen-rt.jar;lib/c5dem.jar;lib/geotransform.jar;lib/j3dcore.jar;lib/j3dutils.jar;lib/jai_codec.jar;lib/jai_core.jar;lib/mlibwrapper_jai.jar;lib/vecmath.jar;"
   >"C:\path-to-java\java.exe" -Djava.library.path=lib/win32/x86_64/ walsaip.vte.VTE  

Substitute the attribute of -Djava.library.path=lib/win32/x86_64/ with /lib/os/arch where os=(win32|linux) and arch =(x86|x86_64)
Include VM arguements -Xms1500m -Xmx1500m to adjust heap size if required.