This is the All-in-One Installer for Nova Upgrade. It contains all so far released campaigns in their current version as of November 2019 together with preconfigured wxLauncher profiles.
You only have to run the executable to start the Installation, where you can read information about every campaign after you have selected the target directory, after that, you can simply install the desired campaigns.
After you have finished the installation, you can run your wxLauncher to select one of the profiles, if you have installed them, with these you only have to setup your FreeSpace2 folder again, as all recommended flags for FreeSpace2 Open aswell the correct Mod are already set. So you only have to "Play" the game with the button of the same name.