This is a plugin for Space Engineers, which adds a random star system generator to all worlds. It generates star systems using all planets loaded with the world, including modded planets. It also generates asteroid belts and asteroid rings.

To install the plugin, download the .dll file. Then go to your Space Engineers installation folder, by right clicking it in the Steam Library, clicking properties and then under local files, browse local files. You then want to create a new folder called 'Plugins' and copy the plugin dll into it. Now go back to Steam and into the properties of space engineers. You want to click Set launch options and add

-plugin "../Plugins/SEWorldGenPlugin.dll"

to it. With that, the game will be launched with the plugin installed. It will likely crash on first launch. For more info, look into the troubleshooting section of the installation page in the wiki.

This readme only contains some information about the installation. The wiki contains more help and info. Wiki