Unreal Editor 4.13 crash when delete "actors"

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Hi, first sorry for my english. I have a problem with Unreal Editor 4.13.

I’m using “ShooterGame” template. I delete almost all objects of the map, only sunlight, post effects…, stay in the “World Outliner”.

But the program crash without errors, why? I reinstalled, but nothing. I’m using the lastest drivers of GPU, I using Windows 10 x64.

Specs: i7 4790k, 16 gb ddr3 2133, gtx960, crucial mx100 256 gb… Thanks for the read!