Hi ,
I confirm that upon removing both programs from my computer, the engine still crashes.
Upon further investigation I found this:
4.6.1:
Assertion failed: PreviousCDO != nullptr [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.6\Engine\Source\Editor\UnrealEd\Private\Kismet2\BlueprintEditorUtils.cpp] [Line: 1062]
4.7.0:
Assertion failed: PreviousCDO != nullptr [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Editor\UnrealEd\Private\Kismet2\BlueprintEditorUtils.cpp] [Line: 1100]
Found this information by pressing ctrl + v after the crash report pops up.
Both reports also include the crash Crash Report I attached.
I can attach the blueprint uasset file that is causing the issue if you want.