Apple today released AirPort Utility 5.5.3 for both Mac (10.8 MB) and Windows (10.1 MB). The updates to Apple's software for managing the AirPort Express Base Station, the AirPort Extreme Base Station, and Time Capsule primarily address an issue that may cause the application to crash during setup.
This update contains bug fixes including the following:
Resolves an issue that caused the AirPort Utility to unexpectedly quit during setup
The Mac version requires OS X 10.5.7 or later, while the Windows version requires a minimum of Windows 7 SP1, Vista SP2, or XP SP3.