Assuming u didnt change the file path when you installed it...
Go to
http://mxsimulator.com/benchracing3/vie ... f=1&t=1053
Download the windows version (unless you are using linux which i doubt)
Also download the zzzx.saf
go to
My computer - C drive - program files - MX simulator - the icon that is the checked flag and called mx.exe (the exe may be hidden) Delete that - move both files that you downloaded into that MX simulator folder - and rename the snapshot from mx-2008-11-20.exe to just mx.exe (again the exe my be hidden, in which case jsut call it mx so it doesnt become mx.exe.exe)
open what you normally do and play
To check it you have it
1. Once you open the game it should says what version it is (ie. 2008-11-20 snapshot)
2. In the controls you should have lean forward and back
hope that helped...