Screen freeze in both 32 & 501 squadron campaigns

[RupertVonHentzau]

I don´t want to give this thread a new direction but, anyway, I recognized a new experience in the posts above:

Flying the "Sealion" campaign for Britain I finally reached the last, 27th mission: Whenever I encounter the first enemy squadron near the coast of Le Havre the game freezes and I have to finish the game via Task Manager.

Is it the campaign? Are there too many planes especially in this final mission for my Intel i7, 2.9 GHz and/or the Geforce GT540M (yes, a notebook, nothing to complain so far from my side) with 8 GB DDR3 memory? (I don´t think so as I was in similar crowded skies before without freezes.)

Have tried this single mission several times and with always the same result.

I appreciate a good hint or the soothing news that this happens to others here as well.