In many cases, yes. Using the same Visio version helps avoid layout changes, missing shapes, or formatting issues when working with legacy files.
They can. That’s why many users stick with Visio 2013 to preserve the original layout, fonts, and diagram structure.
Yes. Many customers buy Visio 2013 specifically for light editing and maintenance of existing documentation.
Yes. Once installed and activated, Visio 2013 works fully offline, which is why it’s still used in restricted environments.
Standard is usually enough for basic flowcharts and org charts. Professional is chosen for technical diagrams, networks, and more advanced templates.