The zip file contains one file with the extension ".ldm".

This ldm-file must be copied into the "Masterpath\data\Manufacturer" directory of your LIFTdesigner installation. In most cases a file with the same filename is already existing in this directory. Please replace the existing file, by the newer downloaded file.

Typically the MasterPath-directory is at: 
C:\Program Files\Digipara\LD50\MasterPath\data\Manufacturer

The ldm-file must not be copied into your current datapool directory, because the datapool directory is synchronized by the "Masterpath\data\Manufacturer" directory.