Epic Games Launcher

With opening the epic games launcher, and then selecting either fortnite or the unreal editor, it does not matter which one i choose first to open, it also starts up the other one.
So if i start up the editor, it also starts up fortnite, but it is only running in the background. there is no screen popping up at all.
I have been googling the whole morning, have tried several things, including uninstalling the launcher, but nothing seems to work.
It was all just fine last night, but since this morning i am only able to have one program open with the other one running in the background but not being able to open.
Even if i am in the editor and trying to connect to the fortnite session, it connects, but where is the screen? so at the moment i am completely stuck and can not do anything. Please help.

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