Hello I have this quick question, how to set all the static meshes Collision Complexity to “use Complex Collision As Simple”. I know you can edit the static mesh and switch it on but I don’t want to go through over 1000 meshes. Is there a quick way of doing this faster? Thanks for the reading! 
This would be so helpful if someone could help.
Bump, is this possible?
I’m interested in this as well. more bumps!
Have a look at this thread: mass apply staticmesh settings - Content Creation - Unreal Engine Forums
Cheers,
Michael Noland
I can make you a plugin if you want. 
Here is a screenshot i made for my team:
You can select all the meshes you want in Content Browser -> change the setting in my tool here -> GenerateCollision -> Done!
EDIT: Looks like i’m late. Michael beat me to it.