Hi SlinkyBroom
All is working fine now. I contacted them and got the standard reply from them to try. Then they gave up pretty much. I’ll post it below. Oddly what seemed to do it for me after trying everything was I spotted my clock on my PC was slightly out. It seems this can cause this problem amongst other things. No idea how my clock went out. I might blame that on the update too 
So Check your clock. Reset it to your timezone. It seems if it varys from what the Sim thinks it should be it can cause problems. Here’s what the help desk suggested:
Please do the following in this order :
1. Delete any Community content that could conflict with the Official Package for the missing or broken aircraft.
- Close Microsoft Flight Simulator
- Go to the “Community” folder located by default here:
C:\Users*YourUsername*\AppData\Local\MSFSPackages\Community
NOTE: If you have installed the packages on a different drive look inside your custom folder (for example D:\MSFS)
- Search for the package folder corresponding to the content (for example “a320-neo” or “wymf5”)
- Delete the package
- Relaunch Microsoft Flight Simulator
- Go to Content Manager.
If the download doesn’t start or the item is still missing in-game after downloading the package, you’ll need to delete the official package as well.
2. Delete the official package to redownload it from the Content Manager
- Close Microsoft Flight Simulator
- Go to the “Official” folder located by default here:
C:\Users*YourUsername*\AppData\Local\MSFSPackages\Official
NOTE: If you have installed the packages on a different drive look inside your custom folder (for example D:\MSFS)
- Search for the package folder corresponding to the content that is missing or broken (for example the folder “asobo-aircraft-a320-neo” or “carenado-aircraft-wymf5”).
- Delete the package.
- Relaunch Microsoft Flight Simulator.
- Go to Content Manager.
- Download the package
The content should now be available in-game.
Kind regards,
Microsoft Flight Simulator Support Team
Good luck.