In addition, the Unity 3D exporter now allows you to specify a custom export path.
Should you forget to change this field, the default is still:
You can also change the location outside of preferences when saving your level file.
Please note that the new Unity 3D feature requires you to update your PlayUp to Unity 3D Importer package in order to load assets from the custom directory correctly. The latest version of the PlayUp to Unity 3D Importer is located on the PlayUp Download page.