Standard installations write logs to AppData and the Windows Registry. A portable version leaves no trace. Once you close the application and remove the USB, it is as if the software never existed on that machine.
Software version strings are not arbitrary. Freemake version 3.6.0.5 (commonly shortened to 3605) is considered by many power users as the "golden build." Why? freemake video downloader 3605 portable top
Some "Top" packs require a manual step: