I had an issue with FS not even starting up and tried all suggested troubleshooting ideas.
So I decided to just re-download it. I figured if I delete the FS folder without the community folder then it would just download and install itself. After downloading ~107 GB of data the game is missing all planes except the Cessna and bush trips are grayed out. When I go into the market store, it shows I can download everything there. If I paid for the premium deluxe version, why doesn’t it install everything? Why do I have to download everything one by one now?
Please be aware that you do not install the Upgrades via the Microsoft Store. Please ensure that the Premium and Deluxe content is not available and ready for download in the content manager. To do so, follow the steps outlined in this knowledge base article: Only 2 aircraft in the hangar - How to install additional content?
If you see the error message “(this content) does not work on this device” please ensure that you are correctly logged in to the Microsoft Store app and to the sim with the Microsoft Account used to purchase a copy of Microsoft Flight Simulator.
So if anyone else stumbles across this post, don’t freak out if all you have is a couple planes in the hangar. You got the hard part out of the way.
Simply go to the content manager (like marketplace but strictly only Microsoft files) and download the rest of the planes and scenery ~5GB and you are off.