Gatekeeper blocks the app immediately. You'll see either "TUIStudio cannot be opened because it is from an unidentified developer" or "TUIStudio is damaged and can't be opened" on newer macOS after quarantine flags the binary.
    To get past it: right-click the .app → Open → Open anyway — or go to System Settings → Privacy & Security → "Open Anyway".

A trusting, highly positive person could really be taken advantage of here.