We want Ghost Desktop to make blogging for you easier - that also means that we keep working on the app and push out updates that the app installs without bothering you. However, building software that keeps itself up to date is hard - and you might run into a situation where our automatic updater fails. In those situations, you will have to manually update your existing installation of Ghost Desktop.
If that happens, here's how to upgrade: Go to Ghost's official download page and download the right app for your system. Simply install the new version - it will automatically replace your existing installation, keeping all your passwords and existing configuration around.