Slitherine

You should have the installer you used to install the game when you first downloaded? Just copy this to another machine and run it again. If not, the only way to get it is to buy extended download service from Digital River

It's best to keep a backup of your installers somewhere - maybe burn to CD.

Indeed. And I remembered the humble memory stick. And my wife's machine has better video than mine!

so all is well for the time being. Thanks for responding to my questions and complaints.