No editor window launching project

…but I can see Unreal Engine running in task manager!

Hello all,
just want to solve this problem.
If I launch the problem, the loading windows shows, but when at 100%, it closes and I can’t see the project/editor.
The task manager clearly shows me Unreal Engine is running, but again I can’t see any window.
How can I solve that?
Thank you really.

Just installed version 4.16 and eveything is fine now.