If you specifically need a standalone .exe file that runs from a thumb drive, consider these powerful, open-source, and free alternatives that offer native portable versions: Draw.io (diagrams.net)
Using modified versions of Microsoft software violates licensing agreements and can lead to legal complications for businesses. Legitimate Ways to Use Visio Portably portable download microsoft visio portable
Your diagrams are saved to OneDrive, allowing you to start a project on your laptop and finish it on a tablet or library computer. If you specifically need a standalone