Run the jar file file that you downloaded above with the java command (J2SE Runtime Environment). In Windows this can be achieved by double clicking on the file from Windows Explorer as long as the J2SE Runtime Environment has been installed correctly. For Linux systems you need to open a terminal and run the command "java -jar NXvalidate-v1.0alpha-lnx64.jar" or "java -jar NXvalidate-v1.0alpha-lnx32.jar" for 64 or 32 bit systems respectively. Once you run the file follow the prompts on the installation GUI to complete the installation.