convert editable font back into ttf?

Unity Engine
1

does anybody know how to convert a editable font back into a ttf format so I can use it with my ui text?

I originally converted the ttf font into a editable format so that I could switch the bilinear filter mode to point.
however now I can’t actually use it.

2

ok so I have this script to bypass saving my font as a editable font

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

[ExecuteInEditMode]
public class PointFont : MonoBehaviour {

    void Start () {
        GetComponent<Text>().font.material.mainTexture.filterMode = FilterMode.Point;  
    }
}

however it throws the error “NullRefrenceException: Object reference not set to instance of a object”

can someone help me out?