I guess so - but on searching around the internet to try and find a solution, it's become very clear that there are a LOT of people other than me who still have cards that don't support DX10 and particularly DX11. This is the first time I've been faced with having to upgrade a graphics card in order to run a sim since I bought a Voodoo card for my Celeron goodness knows how many years ago just to be able to run GPL......
Oh, and thanks for the advice - much appreciated.