If you originally purchased Microsoft Flight Simulator via Steam, you may run into an error where any in-game purchases in the Marketplace never complete successfully, you yet a “Purchase Pending” message on the alerts/bell icon in the top right of the screen.
In order to complete in-game purchases, the Steam Overlay needs to be enabled in 2 places:
- In the Steam client settings here:
2. On the Flight Simulator game settings in Steam here (right-click game in Steam, then Properties):
By default in-game you should be able to press Shift-Tab and the Steam Overlay will open. If it doesn’ go back and check the settings above, and chec k the key combo is not mapped to anything else. If you can’t get the Overlay to open, the in-game purchase via Steam will not complete either, because the in-game purchase pops up a Steam purchase dialog.
Now when you purchase an add-on in the in-game Maretplace, you should get a Steam dialog popup to complete the purchase via Steam, and then you download will start.