the option “Open file in folder” in the PhotoStructure desktop version on Windows (Win 10, in my case) is supposed to open the selected asset in the explorer. For some assets, it does not work for me – instead the explorer opens on some unrelated folder (Documents).
If I copy the selected and run
explorer /select,"Z:\Lars\Google Pixel 3\Camera\PXL_20210402_162401445.MP.jpg"
the explorer opens with the file selected, as expected.