The file you are downloading is a special package created by GamesNostalgia so that you can easily run this Amiga game on Windows Vista, 7 and 10, without any additional effort. The archive includes the required emulator (FS-UAE) and it's already configured. All you need to do is uncompress the ZIP or 7z file into your Games folder (e.g. C:\OldGames\), then open the folder of the Game, and double click the icon "Name of the Game" (it's a ".bat" file).
See the Help page for more info.