Make the .AppImage file executable.
chmod +x <path-to-AppImage>
Windows and macOS versions are signed (Linux does not require this)
Windows version may still warn against running the app, in spite of being signed, due to the nature of the certificate used. In short, there are two certificate types for Windows, one of which can be used with a cloud based CI/CD platform and builds trust over time.
auto updates are enabled on all platforms