enableEmissions is obsolete now.

Questions & Answers
1

Anyone knows how to do it in Unity´s newest version? I have tried a lot of things, but nothing works.

Thanks for your time.

3

Is it possible to have the particles on their own GameObject and just use the standard .enabled code for it?

If not, the most recent documentation on the particle emission module can be found here:

2

This works in Unity 2017.1:

using UnityEngine;

public class EnableParticleSystem : MonoBehaviour {

	// Use this for initialization
	void Start () {
        ParticleSystem ps = GetComponent<ParticleSystem>();
        var em = ps.emission;
        em.enabled = true;
        ps.Play();
    }
    
}