1. Download the .7Z from your account page to a convenient place, eg your desktop
2. Right-Click the file and hit Extract All
3. Once you have extracted the folder, please ensure that if you open it, the next thing you see is the Content Info, Scenery and User Guide . This just means that you’ve extracted it properly.
4. Now, go back up so what you see is the unzipped folder, eg “Time Machine Designs HW180 CB v1.0", and drag that into your Community folder.
5. Now, open MSFS 2020 and you should see it on your world map