Can' t change distribution method in particle system

I’m trying to create a beam emitter with particle system, but when I try to change distribution of Noise Range in the Noise module from “Vector Costant” to “Vector Uniform” it automatically turns on “None”. I have the same problem with every other Distribution in every module. Don’t know what I am missing, have you got any idea?

Im having the same problem. Cant change distribution. Watever i do, it just says none.

If u’ve fixed this. Plz let me know

Go to your content folder and delete the contents of your Intermediate folder. On the next start up it should work.
Don’t know how or why it happens.