Best administration of the library?

General Discussion
2

  1. If the Library is enabled and no directories are configured, all files that are loaded by Mp3tag are included in the Library.

  2. If the Library is enabled and directories are configured, only files from those directories are included in the Library.

  3. If the list of directories to include changes over time, files that are not in one of the configured directories are removed when closing Mp3tag or when "Options > Library > Cleanup Library" is performed. Files that were loaded from one of the configured directories but were later removed from outside of Mp3tag are only removed from the library via "Cleanup Library".

  4. There is no preferred way to bring the library to a clean state. I'd tend to recommend "Cleanup Library", because it doesn't imply that you need to fiddle with the settings on a file-level basis. However, Mp3tag is designed to create a new database if the Library is enabled and there is no library file.