Update

Assets/Editors/ForceCleanupNavMesh.cs

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+#if UNITY_EDITOR
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.AI;
+
+namespace Editors
+{
+    public static class ForceCleanupNavMeshTool
+    {
+        [MenuItem("Tools/Force Cleanup NavMesh")]
+        public static void ForceCleanupNavMesh()
+        {
+            if (Application.isPlaying)
+                return;
+
+            NavMesh.RemoveAllNavMeshData();
+            Debug.Log("Force Cleanup NavMesh: Successfully removed all baked NavMesh data.");
+        }
+    }
+}
+#endif

Assets/Editors/ForceCleanupNavMesh.cs.meta

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+fileFormatVersion: 2
+guid: 0dbfda1e4acd6dd4c9791a3534ec5728