Patch (Worms Armageddon)
From Worms Knowledge Base
The WA Patch updates the original UK release of Worms Armageddon to version 3.0. It's needed before installing the beta update with that version. Other WA releases do not need the patch, and it will break those releases if installed.
The patch can be downloaded from Team17's web site.
WAPatch.exe is a self-extracting zip file containing an InstallShield installer. It can be extracted manually using ordinary unzipping programs.