Rename animation clips

SimpleAnimationClipRename.cs

#if UNITY_EDITOR
using UnityEditor;
using UnityEngine;

public class SimpleAnimationClipRename : EditorWindow {
    [MenuItem( "Window/AnimationClipSuperRename" )]
    public static void ShowWindow() {
        GetWindow<SimpleAnimationClipRename>( "AnimationClipSuperRename" );
    }

    public ModelImporter modelImporter;
    public string find, replace;

    void OnGUI() {
        using (var check = new EditorGUI.ChangeCheckScope()) {
            var obj = EditorGUILayout.ObjectField( "Model", modelImporter, typeof( Object ), false );
            if (check.changed) {
                modelImporter = AssetImporter.GetAtPath( AssetDatabase.GetAssetPath( obj ) ) as ModelImporter;
            }
        }
        
        // show name of all clips
        using (new GUILayout.VerticalScope( EditorStyles.helpBox )) {
            if (modelImporter != null) {
                var animationClips = modelImporter.clipAnimations;
                foreach (var animationClip in animationClips) EditorGUILayout.LabelField( animationClip.name );
            }
        }

        find = EditorGUILayout.TextField( "Find", find );
        replace = EditorGUILayout.TextField( "Replace", replace );

        // preview name of all clips after rename
        using (new GUILayout.VerticalScope( EditorStyles.helpBox )) {
            if (modelImporter != null) {
                var animationClips = modelImporter.clipAnimations;
                foreach (var animationClip in animationClips) {
                    var newName = find == replace ? animationClip.name : animationClip.name.Replace( find, replace );
                    EditorGUILayout.LabelField( newName );
                }
            }
        }

        // button for action
        if (GUILayout.Button( "Rename", GUILayout.Height( 30 ) )) {
            Rename();
        }
    }

    void Rename() {
        var animationClips = modelImporter.clipAnimations;
        foreach (var animationClip in animationClips) {
            animationClip.name = animationClip.name.Replace( find, replace );
        }
        // apply
        modelImporter.clipAnimations = animationClips;
        modelImporter.SaveAndReimport();
    }
}
#endif