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.PCB files won't open

Hi, 

I am designing a mppt solar charge controller for a solar powered golf cart as part of my senior design project. I am looking to use the TIDA00120 as a reference design but scale it up to work with a higher input voltage and larger battery bank. However, the pcb and schematic design should remain very similar. My problem is that I can't find a way to open these design files. I downloaded the zip file that included the ,pcb and .sch file for the development board for the TIDA00120. I believe it is called PMP7605. I have tried using Eagle and Altium Designer to open these files, but both say that the file type is not recognized. Please is there a way to open these files. I am on a time crunch and it would save a ton of time if I didn't have to design the PCB from scratch. 

Thank you!