: It leaves no trace or leftover files on the guest computer after it is closed. The Legal and Security Risks of Repackaged "Portable" CAD

: Use LINE , POLYLINE , and RECTANGLE (type D after starting the command to set exact dimensions).

Instead of making the application portable, make your entire operating system portable. Windows To Go (available via tools like Rufus) allows you to install a full version of Windows 10 or 11 onto a fast external SSD.