Hello, To download an update, Check out this link :)
https://itch.io/t/1128078/how-to-download-the-updates
Hi, thank you so much. But now I can't tell whether I should uninstall the previous game before installing the new version or simply replace it with the new version when adding it to the applications folder on mac.
Both should be ok on mac.
But to make extra-sure your savefile is intact, you should enable the cloud save (in main menu/Play/Cloud save)