Why is UE4 crashing when I try to look at particles in cascade editor?

I’m trying to look at a pre existing particle, though this also happens when I try to create a new particle system too. when i click on any of the properties of the particle shown in cascade it crashes UE4. it does send a crash report. I have tried opening a particle from one of your free tutorial packs as well, but its the same result.

Im working on a Win10 OS
64bit. 8core, 32gig ram.

I dont appear to be near my working limits PC wise.