License/HWID checks happen inside the app after launch (not in the browser).

macOS Gatekeeper: if you see “Apple could not verify…”, right‑click the file → Open, or run:
chmod +x ./flashrug-gui-macos-*
xattr -d com.apple.quarantine ./flashrug-gui-macos-*
If you’re behind a corporate proxy, downloads may require allowing this domain.