How to fix packages showing as "not installed" in the content manager

If the packages are correctly nested in the installation folder but the Content Manager cannot find them/shows the packages as "Not installed," please do the following:

• Close Microsoft Flight Simulator
• Depending on your platform, navigate to: 
  • Microsoft Store 
    • C:\Users\YourUsername\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache
  • Steam
    • C:\Users\YourUsername\AppData\Roaming\Microsoft Flight Simulator
  • Retail disc
    • C:\Users\YourUsername\AppData\Local\MSFSPackages
• Delete the file 'Content.xml'
• Relaunch Microsoft Flight Simulator

The Content.xml file will be rebuilt, and the packages will now appear in the Content Manager as "Installed."