0.9.3
Both live at ~/Applications/Nuvo.app: the release bundle, which is a real app with a native window and the server beside it, and what instalar-app writes, which is a shortcut that opens the browser. Someone who installed from the site and then ran instalar-app — reasonably, since that is how the README said to get a Dock icon — traded the native window for a Chrome one with nothing explaining the change.
On macOS the command now recognises the release bundle by the server sitting next to the executable, says the app is already installed, and writes nothing. The check runs before the delete, which is the whole point.