Google Downloader Problem

As a lot of people know, Google released an expansion add-on for Android apps that exceed the 50MB limit. I downloaded the Googleplay downloader OBB utility from the Asset Store but when i tried to Build my app it returned the following error message:

Assets/Plugins/Android/GooglePlayDownloader.cs(16,24): error CS0246: The type or namespace name `AndroidJavaClass’ could not be found. Are you missing a using directive or an assembly reference?

And then I have to delete the Android folder entirely and reinstall it. What can be done to fix this?

Upgraded to the new version of Unity and the problem with the plug-in still exists. I ran a test Build on MonoDevelop and it returned 300+ errors. I don’t know anything about programming but it’s interrupting the Build. It does it regardless of what platform I try to deploy for. Anyone know how to fix it?

First of all, you don’t know anything about programming? You don’t just download the Google Play OBB Downloader and it auto-magically works.