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Download the latest distribution of snaphu here: http://step.esa.int/main/third-party-plugins-2/snaphu/ and make snaphu.exe available to your command line.
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Open snaphu.conf (which you just exported) in a text editor and copy the command given there.
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Run this command in with your shell in the same folder.
Also explained here: https://m.youtube.com/watch?v=xbIrhbzNrRo (from 4:30)