In order to design digital power , find that TI has a development board as BOOSTXL-BUCKCONV for reference. By researching the development board image in the user guide, it is found that there are two active loads in the figure, and there is only one in schematic diagram, so the development board is downloaded from CONTROLSUITE. PCB and SCH files can't be opened with ALTIUM DESIGNER. Who can help me? or a PCB file can be opened by ALTIUM DESIGNER.