If portability is your main goal, switch to software that was designed to be portable. These are legitimate, lightweight, and often free or low-cost.
If you have a Microsoft 365 Business or Enterprise subscription (E3, E5, or certain F plans), you get access to Visio Online. visio 2013 portable
Verdict: 3.5/5 Stars Functional and familiar, but legally grey, potentially unstable, and showing its age. If portability is your main goal, switch to