Nbspupdate, part of the Nbspadm package, is a tool for upgrading Nbsp in semi-automatic fashion. It will check, download and install the Nbsp package from this site, if the latest version available is newer than the version installed in the host where nbspupdate is executed. It can also upgrade Npemwin (and even Nbspadm itself), and has several options that modify its default behaviour.
The Nbspadm package is available from the software section of this site, and usage instructions and examples are provided in the Nbsp Recipes.