Windows program named BoardView version 5.0, a small 643 KB executable. Boardview viewers open board layout files so a technician can see component placement, net names and connections on both sides of a motherboard, which helps locate test points and trace shorts. The name does not say which file formats this build supports, so test it with your boardview files. Scan any executable from an unknown source with antivirus software before running it on a workshop computer.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @pkbiosbdv. Enginerys does not host this file.