The offline installer (Elixir.iss) packages a specific Elixir release to install, and also can append the system's Path variable appropriately. This kind of installer is currently not distributed in binary form.The web installer (ElixirWeb.iss) is what's currently distributed (see Releases). The web installer itself does not install Elixir. It packages the files necessary to download, compile, and run the offline installer for the selected Elixir release. It also handles installing Erlang and adding it to the system's Path variable.