As you can see there is nothing in this archive except this file.
The service from which you downloaded this file has (probably) been advised that a new version of DlgXRSizer has been released but (probably) hasn't got around to updating their link.
Sorry about that!
For the latest version of DlgXRSizer, please go to:
http://www.gajits.au.com
DlgXRSizer is now Sharware. Sorry about that. Sucess brings its own problems - one of which is insufficent time to continue developing the product along with supporting users.