I have removed trees that are not around the airport in real life.


To install, extract the file, then move the contents into the Community Tab of Microsoft Flight Simulator. 

To find the community folder using Steam go to your Steam Directory, steamapps, Common, Microsoft Flight Simulator, Community. If the game is installed to a different hard drive than your steam folder, right click your game in steam, go to manage, then browse local files, youll see the community folder there!

 

If theres any issues please just comment, I'll do my best to fix it. I've never done anything like this before, but it worked for me so hopefully it helps others.