Right from phpnuke.org:

PHP-Nuke 7.5 Final version. This version includes a totaly new modularized administration and multiple administrators management. Several bugs has been fixed, cosmetic changes, some html errors fixed, almost all variables validation added and many more. Additionaly PHP-Nuke version 7.4 has been released for free to the public on the downloads section.

Admin note: As usual you can always get the latest releases right here! Nuke v7.5 is available in our download section.