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What software is used to design the PCB file of the LTC5553 verification board on the official ADI website. The file contents are garbled and disordered

I downloaded the PCB file of LTC5553 from the official website of ADI, but after opening it with several versions of PADS software, the content was confused.I downloaded the PCB file of LTC5552 again, the situation is the same.What version of software did the engineers at Linear use?

I am using PADS2.6