I agree with trying the content manager then and see if they're listed there. On a side note, I just went into mine and discovered that even items in the Community folder are listed.
Try this: From the Main Menu, click the Profile tab and then click Content Manager. Search for the missing aircraft in the search bar and if you see the relevant packages, try either Installing them, or if they appear to be installed try deleting them and re-downloading them.
Jan, the most common method I've seen of solving that issue is to log out of your account (top right of main menu screen) and then log back in again.
You might need to head over to Zendesk and report the problem there.
Speaking of Zendesk, there is a dedicated support page to just such an issue.
https://flightsimulator.zendesk.com...xe-or-Deluxe-Premium-content-Microsoft-Store-
What's funny is that everything says you need 1909 or better to even install MSFS. I purchased, installed, and ran mine on 1904. I only updated to 2004 a couple of days ago!
Jan, the most common method I've seen of solving that issue is to log out of your account (top right of main menu screen) and then log back in again.
Bingo!! Thank you, John !
True, it *did* mean downloading and installing 15 Gig of 1.8.3.0 patch again, i suppose this time from MS.....Got lightning fast internet so not a problem. In any case, i've got the whole shebang of aeroplanes back again, like i had them before, including the Baron, Cessna's and Zlin Shock Ultra.
Just hope they won't disappear again..
Thanks again, John, much appreciated !
1909, 1904, 2004, no clue what you're talking about here, Tom.