Open Glas in four steps

1. Open Glas-0.4.0.dmg from your Downloads.
2. Drag Glas onto the Applications folder.
3. Open Glas. macOS stops it once: in System Settings > Privacy & Security, click Open Anyway.
4. Allow the microphone and Accessibility, then sign in with your email.

The download did not start? Download Glas 0.4.0 (1.0 MB).

Prefer Terminal for step 3:
xattr -dr com.apple.quarantine /Applications/Glas.app