This is an GUI application written in C#
Since the update v20.0.0 ('I Am The Sun') of MKVToolNix, the old MKVExtractGUI2 is no longer working;
so I wrote this application, to make things easy again.
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Advantages (compared to MKVExtractGUI2):
the entire window accepts file drag & drop (file path will be written into the "input" TextBox).
other than .mkv and .mka, OpenFileDialog allows .mks and .mk3d files. (WebM files in addition since release 1.0.3)
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Disvantages (for now):
probably not all the output file extensions are covered.
a track selection is not designed, all the tracks will be equally extracted.