The script can be launched from the button StarGen available under Exchange Store Menu. See below screenshot of Exchange Store Menu. If you are unable to find the menu, then please reset the workspace and restart the product. StarGen is a maxscript for 3ds Max. It generates a 2D image of starfield or night sky. It is useful for creating a skybox, or space scene, or as a sky background for 2D art.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin.

You may need to restart the Autodesk product to activate the app/plug-in.

To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8/8.1/10) and uninstall as you would any other application from your system.

Note that the last created bitmap is lost when you create the stars again with new parameters or even with same parameters. So save your work!