Editor crash when opening 5.0 project in 5.1

Thank you so much for the reply!

I tried kicking it down to DX11, same crash though.

These are my current settings in DefaultEngine.ini:

[/Script/WindowsTargetPlatform.WindowsTargetSettings]
+TargetedRHIs=PCD3D_SM5
+TargetedRHIs=GLSL_150
DefaultGraphicsRHI=DefaultGraphicsRHI_DX11

…and these are my PC specs:

NVIDIA GeForce GTX 1080
Intel Xeon CPU E5-2643 v4 @ 3.40Ghz
64GB RAM
Windows 10