The official vIDE page at PUBInstallation notes:

You will need at least an 1.2 Java VM, which is not included in the package you downloaded.
Here are some links to sites from where you can download it from:
  After you have installed the JVM, unzip vIDE.zip and start the IDE by typing:
    vide
in the directory where you unzipped it. If it does not start, it seems like u have bad luck.