Upon re-opening the preferences that page will be selected by default Bug fixes: - Mkvmerge: fixed a segmentation fault when exiting prematurely due to write errors such as the destination having run out of space - Mkvmerge: DTS: fixed wrong channel count for DTS tracks with XCh extensions - Mkvmerge: MPEG TS reader: fixed detecting h.264/AVC and h.265/HEVC tracks that consist of only a single frame - Mkvmerge: MPEG TS reader: fixed handling of unbounded PES sizes for tracks that consist of only a single PES packet - Mkvmerge: MPEG TS reader: PGS subtitle tracks are now exempt from the 'detect bogus subtitle timestamps' heuristic which could lead to some PGS subtitles not being timestamped correctly.

The 'list of spoken languages by native speaks' isn't used anymore - MKVToolNix GUI: header editor: added an option to remove all attachments to the tree context menu - MKVToolNix GUI: while the GUI is running it will remember the last page that was selected when the preferences dialog is closed. New features and enhancements: - Mkvmerge: AC-3: file identification will report AC-3 tracks encoded in Dolby Surround EX as codec 'AC-3 Dolby Surround EX' - MKVToolNix GUI: multiplexer: on new installations the GUI will now recognize all known ISO 639-2 language codes in file names by default instead of only the top 100 of languages by native speakers - MKVToolNix GUI: multiplexer: on new installations the list of 'often used languages' will by default only contain certain agnostic ones ('multiple languages', 'no linguistic content', 'reserved for local use', 'uncoded languages'), 'English' and the default user interface language.

For apple download MKVToolnix 81.0.0