As of March 31st, 2012 Bungie officially discontinued their API's for the Halo Stats, what this means for Halo Stats Archivier is that it will no longer be able to download any games played after this date (see here for more information). In the future, likely begining with Halo 4 I may add support for downloading games. Currently all data downloading has been disabled in the latest update, and I have removed download links. Reach may see a reprival in data should 343 provide the api for this. So stay tuned.
Halo Stats Archiver: Desktop Edition (HSA: DE) allows you to download and archive all of your Halo Stats, from Halo 2 to Halo: Reach (Console versions only), everything from Screenshots to who killed who and where (via game images). HSA: DE 2.0 is a complete rebuild from its predisessor, built on the power of the Adobe AIR platform it brings easyer installing, updating and a slick new design. As well as easyer install and many other mass improvements HSA is platform independent, with support for Linux, Mac, and of course Windows see Adobe.com for Adobe AIR requirements.
HSA: DE 2.0 adds a host of new features over the original, including support for Halo 3: ODST and Halo: Reach.