How would I run the program under DX9 instead of DX10? I've looked through the technical FAQ but I can't see any notes on running the application with switches or anything.
I have DX11 installed, running on W7 SP1, current certified drivers for all devices.
I'm also using the demo downloaded from this site as the button in the steam store is not active (there were quite a few people in the steam forum saying "why can't I download the demo, the button doesn't work" so I just came here instead)
OK, interesting! The download button does work, it just looks like it doesn't do anything - Steam doesn't react in any way - it must be to do with the packaging as every other game or software I've downloaded through Steam pops up saying it's downloading, then it's installing but nothing here.
I only spotted this when I went to remove to re-install and found it was listed twice under different names.
This also answers the DX9 question as Steam has a "force" option. I'll try the Steam version and report back.