I haven't really tested MusicZen, but it does claim portability. You'll have provide an email address to download, but disposable ones work alright. It comes in an EXE package that will extract without warning to it's current location, so be wary.
https://www.musiczen.org/ wrote:[MusicZen is] The easiest way to organize your MP3 Music Files.
https://www.musiczen.org/reference-guide/ wrote:MusicZen will not tag your music files; rather, it will read the existing tags in your mp3 files and use this information to create the directories and the name of your files. If MusicZen does not find this information, it will place the files in an “Unknown” folder.
https://www.musiczen.org/faq/ wrote:MusicZen will not help you tag your files, instead it reads the tags in your files and it uses this information to organize your files based on the order you specify in the preference tab.
The last MusicZen version is v1.4.4, released 2017-04-03 (changelog at https://www.musiczen.org/change-log/).