Download the latest from:
http://awstats.sourceforge.net/#DOWNLOAD
Extract the archive:
Copy:
awstats-7.0\wwwroot\cgi-bin\awstats.pl
To:
/usr/lib/cgi-bin
Copy:
awstats-7.0\wwwroot\cgi-bin\lang
awstats-7.0\wwwroot\cgi-bin\lib
awstats-7.0\wwwroot\cgi-bin\plugins
awstats-7.0\awstats-7.0\wwwroot\icon
To:
/usr/share/awstats
Open Webmin, Webmin Configuration, Webmin Modules, then browse for the file
awstats-7.0\awstats-7.0\tools\webmin\awstats-1.9.wbm
and install.
Update should now be complete.
Have answered my own question here: https://www.virtualmin.com/node/21442