Find the full version here:
OPN 2.4.6

openphpnuke-2.4.6-full.* - The whole OPN, with modules and all languages included
openphpnuke-2.4.6-core.* - OPN without the modules
openphpnuke-2.4.6-modules-full.* - Only the modules complete

There are also update files to update older OPN versions 2.4.5 to 2.4.6 here

If you do update OPN, please follow this update introduction.

We recommend to use the *.tgz or *.tar.bz2 files.
These are much smaller than Zip's. Windows can use theses files without trouble:
*.tgz can be handled with Powerarchiver, Winzip or Winrar.
Powerarchiver or Winrar can handle *.tar.bz2 . A pure " tar for Windows" is available as gnuwin32.

The OPN-Team