In-app update
When a newer version is published you’ll see a banner (and a Check for updates button in Settings → General):1
Update now
Raven downloads the new version in the background and shows progress.
2
Restart & update
Click to quit and install. Raven reopens on the new version.
Platform notes
Updating to 2.4.1 on a Mac still uses the old flow one last time (download the installer, drag to Applications), because your installed 2.4.0 predates in-app self-update. From 2.4.1 onward, macOS updates in place like Windows.