What's Subversion For?

I saw this message http://xach.livejournal.com/193855.html on Planet Lisp and was excited. I followed the links and ended up here http://article.gmane.org/gmane.lisp.openmcl.devel/2878. This article has a link to a Subversion system. I wanted to get Closure CL for my Windows box (win32) but have never used SVN before. I navigated to something that looked similar to this: wx86cl.exe and I downloaded it. Clicking on the downloaded .exe file doesn't do anything. How do I go about doing it?
Thanks,
hmas

See Getting Clozure CL with Subversion.

For Clozure CL, you can browse the repository online.

Also, when getting wx86cl.exe, remember to get wx86cl.image and put it in the same directory.