Thank you very much Periadot. My problem was a DirectX version problem. My new Windows 10 computer comes with DirectX version 12, and nothing happened after connecting to game servers, no message, no new window... I solved it by installing old runtime versions of DirectX from Microsoft site (https://www.microsoft.com/en-gb/down...ils.aspx?id=35). Now the game can open the client (player) window, and I could choose version 10 instead of 12; now everything is great.
Very kind of you. Best wishes to you.