Bubble Column was the key!
I would just like to thank all of you who offered advice on getting my v1.1 to run as it should.
I finally managed to sort things out by un-installing everything, running the registry cleaner, upgrading the drivers to those posted by Morgan - NOT Nvidia's latest! - re-installing v1.1, and last but not least... turning off the bubble column!
The bubble column was the key, with it running I was still only getting about 30 fps, but with the column OFF, I'm averaging a frame rate in the high 50's!
If anyone else has a similar problem, try turning off the bubble column, you never know, it may work for you too!
Paul
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