The Community folder can be found by following the steps below:

  1. Open Explorer, and click the view tab, then select "Hidden Items"
  2. Navigate to the following:
    1. STORE USERS:  C:\Users\<USERNAME>\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache
    2. STEAM USERS:  C:\Users\<USERNAME>\AppData\Roaming\Microsoft Flight Simulator\
  3. Open "UserCfg.opt" in a text editor
  4. Search for "InstalledPackagesPath" 
  5. Navigate to this folder. If there is no "Community" folder, create one using the same name.