Stuart's comment was right on. That layout is for version 3.2.1, and it won't work with version 2.5.14.
A little bit more info: that layout was exported, which is a good method to use to share a layout that uses more than just a single layout file (for example, a layout that uses images). If you were using version 3.2.1, you could go to the Layout tab and press the "Import / Export" button, then press the "Import an exported layout into your Data Store", then select the downloaded layout. That layout contains a few files, and doing this would "unzip" those files into the correct places within your Data Store. Then you just press the "Load" button on the Layout tab and select the appropriate layout file.