StreamFab for Windows MKVToolnix V87 "Blackas theSky) Released -

[Chameleon]

https://mkvtoolnix.download/downloads.html#windows

[Germania]

Now I thought the version was new ..
.. but I already installed/unzipped it 4 weeks ago.

SF contains/use mkvmerge v68, is still only 28 months old (see also here)

[Sebastian001]

python is even older... version 3.7.9 from 2020