WinAce is a discontinued application which means you won't have the possibility to download it anymore from its official website.
I recommend choosing another alternative such as 7Zip or WinRAR . The first one is open source and handles known archives and the WinRAR is shareware with the possibility to test it for 30 days after which a nagging screen appears but it's still usable.
You can, however, download the latest version from the application's page at Software Informer. Select the version 2.6 from the version drop-down menu and then you will have the possibility to download it.