There’s no big surprise that it’s accessing the registry. It’s installing our thumbnail handler. It spawns executables that install Visual Studio redistributable packages from Microsoft, and check your license key information to verify that the version you’re installing will run with the license you have.
If there are any specific items in this list that are of concern, please point them out and I’ll let you know why they’re there, but there are hundreds of things in this list, and everything I can see so far has a valid use case either for installation of the software, our license system enforcement, or just normal execution.