Why Am I Getting This Message In My Admin Panel?

I don't understand why I'm getting this message in my Admin panel? I haven't modified any core files (I wouldn't even know how to).

I've been getting this message since installing one of CS-Carts updates. As far as I can tell, my installation of MV should be up to date.

Any help is much appreciated.

CS-Cart Problem.JPG

So what files are marked as changed if you click on the link in this message?

So what files are marked as changed if you click on the link in this message?

It says the only file is "products_multicolumns.tpl" in the product_list_templates