Professional Tag Editor is a powerful universal tag editor for audio and video files. Features:

Edit tags ID3v1, ID3v2, APEv2, MP4, Flac, Ogg Flac, Ogg Vorbis, Opus, Ogg Theora, WMA, WMV, WAV (INFO/BEXT/CART)
File formats supported: MP3, FLAC, FLA, FLC, OGA, MP2, MP4, M4A, M4B, 3GP, MPA, OGG, OGV, WMA, WMV, WV, OFR, MPC, APE, WAV, TTA, ALAC, SPX, AIF, AIFF, AIFC, AFC, ADX, AIX, OPUS, DSF, DSD, DFF, TAG, ID3
Manage cover arts
Copy/paste between the supported tag formats
Export and import tags to re-use them as templates
Powerful search functionality to find video and audio files in your library
Download poster and movie details from The Movie Data Base for MP4 video files with a couple of clicks
Edit all meta data MP4 atoms and ID3v2 frames
Batch rename files by their tags
Full unicode support

Whats New:
Improvements to UI DPI scaling and to tags reading.