This version is no longer for sale but is available here for those who need to re-download.
WordSmith 4.0 was current from 2004 to 2007.
Once you have WordSmith 4 up & running, you can update automatically by choosing File | Web Version Check in the main menu. This will check the version of each file you have against the same table (at www.lexically.net/downloads/version4/wordsmith_versions.htm) and will know what needs to be updated.
Installation and Running WordSmith 4
If you downloaded the self-extracting .exe file e.g. to c:\temp, just run it: it will help you expand the contents into c:\wsmith4 or wherever you choose. All the files must be put in the same folder. The one suggested is c:\wsmith4 but this entirely up to you.
To install, all you need do is be sure you have all the files in the same folder. (Of course you can put your wordlists and concordances wherever you like, eg. in sub-folders of \wsmith4 or on quite different drives; you only need ensure all the program files -- the ones you downloaded -- are in the same place.)
To start using WordSmith 4, run \wsmith4\wordsmith.exe. You will be asked to agree to Terms & Conditions then will be taken to an updating window (\wsmith4\updater.exe) which will allow you to type in a registration code if you have purchased one. It'll also allow you to put an icon on your desktop.
If you have never used WordSmith, you may find it best to choose Help | Contents | Getting Started, or | Overview in the menu.