Hallow. i just try to unpack your sources, and got a trouble - winrar3.8 and 7zip 4.65 they both dont recognize it.
It is a gzipped tar archive. You can open it both in Linux systems and Windows systems. In Windows I can double click on it and open with 7zip (version 16.02 but I am sure that older versions should work; you will see an archive inside another archive). In Linux I can open it with command line on bash tar xzf yanu_latest.tar.gz.tar