Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
On the latest version of UI Flow Desktop IDE for macOS, copy and paste doesn't work at all.
@ahmadagb UIFlow desktop hasn't been updated or maintained in ages. It is scheduled to be updated when UIFLow 2.0 is ready next year.