You should be able to. Try going to "My library" where all your Itch purchases should be listed, find Didnapper 2 there and click on Download.
Otherwise, Itch also has a launcher app you can use to install games from Itch: /app
Thank you and I would like to know why my game can't save my progress, after saving in the game, closing the game window and opening it is a new game
Have you extracted/unzipped the game after downloading it?
