As a gesture of goodwill Steam have fully refunded me for my copy of extremes.
This will be the first time ever that I've managed to get a refund on used PC software but I suppose that if the product is NOT FIT FOR PURPOSE then it is only fair. A quick search on the internet recently hints at a proposed change in the law with regards to software refunds and to give customers more rights.
SSE is certainly not the first piece of software that I've purchased that IMO has fallen way short of the mark, there was a lot of angry faces when Ubisoft released Assassins Creed 2 for the PC and I was one of them!!!
I wish SSE's developers the best of luck with regards to ironing out all the bugs and making this the simulator that it should be but for now I'm back on SS2008 New Horizons, great bit of software there, highly recommended.
Once again thank you Steam, A+ customer service