A single file, Inustial Loader.exe. It prepares and verifies everything it needs in a .inustial folder next to it, keeps itself up to date and opens the key screen. It does not modify your games.
Download Inustial Loader.exe and check that its SHA-256 matches.
Put it in any folder and open it.It creates a .inustial folder next to it. If that folder is read-only, it offers your user folder instead. No administrator rights needed.
The first start downloads and verifies the components (about 130 MB).Later starts reuse them, repair damaged files and install updates automatically.
Enter your key. If SmartScreen warns you, choose “More info” and “Run anyway” only if the SHA-256 matches.