Unity tool to replace a sprite across all scenes

ReplaceSpriteWindow.cs

using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using UnityEditor.SceneManagement;
using UnityEngine.SceneManagement;

/**
 * Use this utility to replace one sprite with another across all scenes.
 * This can be easily extended for other types as well (AudioClip, Material, etc...)
 */

public class ReplaceSpriteWindow : EditorWindow
{
    private static Sprite _target1;
    private static Sprite _newTarget;
    
    [MenuItem("Tools/Replace Sprite")]
    static void Init()
    {
        var window = (ReplaceSpriteWindow) GetWindow(typeof(ReplaceSpriteWindow));
        window.Show();
    }

    void OnGUI()
    {
        _target1 = EditorGUILayout.ObjectField("Replace This", _target1, typeof(Sprite), false) as Sprite;
        _newTarget = EditorGUILayout.ObjectField("With this", _newTarget, typeof(Sprite), false) as Sprite;

        if (_target1 != null && _newTarget != null)
            if (GUILayout.Button("Replace"))
                ReplaceSprites();
        
    }
    
    private static void ReplaceSprites()
    {
        EditorUtility.DisplayProgressBar("Replacing...", "", 0f);
        var scenes = GetSavedScenes();
        foreach (Scene scene in scenes) // iterate over all scenes in the project
        {
            bool change = false;
            var rootObjects = scene.GetRootGameObjects();
            foreach (GameObject rootObject in rootObjects)
            {
                var spriteRenderers = rootObject.GetComponentsInChildren<SpriteRenderer>(includeInactive:true);
                foreach (var renderr in spriteRenderers)
                {
                    if( renderr.sprite == _target1 )
                    {
                        renderr.sprite = _newTarget;
                        change = true;
                        Debug.Log("Replaced sprite in scene:" + scene.name + "  obj:" + renderr.gameObject.name);
                    }
                }
            }
            if (change)
            {
                EditorSceneManager.SaveScene(scene);
            }
        }
        EditorUtility.ClearProgressBar();
    }
    
    private static IEnumerable<Scene> GetSavedScenes() {
        string[] guids = AssetDatabase.FindAssets("t:Scene");
        foreach (string guid in guids) {
            yield return EditorSceneManager.OpenScene(AssetDatabase.GUIDToAssetPath(guid));
        }
    }
}