If you're talking about replay file associations, it's not the exe, but the registry that is misconfigured. Perhaps you tried to associate WAgame files with WA.exe by hand, which ruined the extra options. You can try reinstalling the latest update to fix the issue. If that still doesn't do it, go back to where you set the associations by hand, and instead of WA.exe choose Worms Armageddon. Lastly there's a bat file I posted on the forum somewhere that helps you clean the made-by-hand choice.