Hey Matt,
I apologize that the downloaded file contained an incorrect Readme file for the TPS54060. The readme file should contained the following message:
To import your new SCHEMATIC into Altium:
1. Start the Altium program.
2. From the menu select "File" and then select "Open".
3. Select the file named in the path above ending with ".SchDoc"
and "Open" the file.
4. Your schematic should be viewable within Altium.
Due to the recent software update, it looks the incorrect Readme files are being used. We will make the correction ASAP.
Sorry for the inconvenience and thank you for notifying us the issue.