An archive of repair files. Shared as “DVR-K72A_EUROPE-ML_STD_V4.30.101_Build_191120.zip” — a .zip file, 15.0 MB.
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 @tvsoftwareworld. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.
Built-in OS tools7-Zip