A "portable" application does not write to the registry and can run from a USB stick. Users want a (or any portable version) for specific reasons:
Autodesk uses sophisticated licensing services (AdSSO, FlexNet). These run as background services on the PC. A "portable" version usually involves cracking these services, which is why they are often unstable, prone to crashing when saving files, or refuse to render. 3ds max version 25000 portable