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I tried the patch. It installed (copy) itself without any trouble and the game started without any problem, no cache cleaning needed.
In my case I did not see a big improvement in fps, especially above London the minimum fps is still very low, seven (7), the max is higher 70 before it was 50 so the medium is a little higher also 30. The clouds have a big impact.
Over London the stutter seems 20% better and there is less stutter near the ground.
Radio communications are simplified and the other pilots do obey to them. But the ground control does not but this I should test again.

All in all for the moment I love it, thanks to the team of creators.