Thanks for link but a little info would help us to know what is being downloaded.
This appears to be a demo for a commercial addon, payware. The demo readme is in German, no English description available on the site.
A google translation of the readme
Values flyer!
This is the first trial to
"Helmut Wick aces vs. JC Dundas -. Deadly duel in November 1940"
We hope you enjoy and a few hours of fun flying the missions.
The campaigns are designed for realistic virtual fly and use the options to the "IL2 Sturmovik - Cliffs of Dover" offers. We strongly advise you to fly on realistic settings, including complex engine management. Please remember that the AI in "IL2 Sturmovik - Cliffs of Dover" with complex engine management on the go. The flight behavior stands out significantly from non-power management settings.
The campaigns are available in two versions: Full and Low. Low is designed for less powerful computers. This is also suitable for 2-core processors.
Installation
Double-click the installation file and confirm the installation. You do not need to set paths or anything to select. You can choose whether to install the version for smaller systems or for high-performance systems or both. To do this, select the appropriate box (by default both are enabled). After the installation is complete, run "IL2 Sturmovik - Cliffs of Dover". Select "Single Player" and then "campaign." Now you can start a demo of the two campaigns.
Content:
5 missions - 3./JG2 "Richthofen"
5 missions - No. 609 Squadron
5 missions - 3./JG2 "Richthofen" (Low)
5 missions - No. 609 Squadron (Low)
Update function
About the update function (under Start-> Programs-> Disaster Soft-> Wicker vs. Dundas DEMO-> Update DEMO "), you can download in the next few weeks of the announcement that one or other additional mission.
Staff
Dimitri Kirillov: installer, update routine, web design, scripting
Christian Koller: graphics, aircraft coatings
Olaf Binder: Mission Design
Sven Grötsch: 3D Modelling / Beta Testing
Thomas Voss: historical background, mission design
Richard Spiteri: Beta testing
Gerd Freiburg: Beta testing
Credits:
The virtual StG 2, Torben Fleischer, Sven Krug, Peter Schaller, Norbert Mertens, BZB_Flying Doc, Hans Schmid, Günter Martin, Sascha Driess, Liam Standish, Vivian Standish, Colonel Steve Huettel, Henrik Ostendorf, Hannes Ostendorf, Julius Meimberg (4th Staffel / Jagdgeschwader 2 in 1940), Christian Schulz, Gaby Chollewig, RA Ingo Voigt, Kosta Ntemos, Oleg Maddox, Thomas Schuldt, John Seidl, Joachim Stever, Andrea Binder and many others.
Your Team Soft Disaster
Hamburg, 26.05.2011
