This may have been due to exiting while the program was still scanning folders when the media library was still enabled, but it's stupid Java, so who knows. If you are looking for a 100 open-source Media server for your office or home then Emby is the best one. Generally, its additional files, such as preference files and application support files, still remains on the hard drive after you delete Windows Media Player X. Like Plex, the Emby is also has a dedicated Linux installer for Debian, Ubuntu, Arch Linux, OpenSUSE, Fedora, and CentOS. One time so far the javaw.exe process stayed stuck in memory on exit, consuming over a GB of RAM. The Emby Media server is available for Windows, Linux, Nas Devices, Mac OS, Docker, and FreeBSD. And it doesn't mention that the server has to be restarted to recognize this change. I had to disable transcoding of mp4 and others, because it was transcoding most files even though my WDTVLive device supports them directly just fine. I disabled and forego the media library to avoid this. Only caveats I've found: - The database size it creates for a modest media library it rather large, and takes forever to scan. But the program is nicely configurable, and does work rather well. Well, it's still a thing made with yucky Java, but at least now it includes its own runtime of it, so there's no ancient security risk, system polluting, full Java install required anymore! Of course, being Java, it's a RAM, CPU, and disk space hog.