MetaDoctor / MetaDoctor Pro version 2.0.3 is updated for macOS 10.13 High Sierra. It includes a critical fix for the error in saving metadata to files with version 2.0.2 introduced with High Sierra.
In addition, version 2.0.3 includes a new advanced tag editing feature, available in the Tags menu. This feature allows access to additional tags, some of which are not read by iTunes by may be read/used with other media player/manager software, such as keywords.
Version 2.0.3 utilizes the latest Apple SDK, for maximum performance and compatibility.