Hello, i found a fix for Steam version which worked for me (not guaranteed to work for you):
I deleted the %appdata%/Microsoft Flight Simulator 2024/StreamedPackages/ “asobo-proceduralgeneration-…” folders (ALL OF THEM), turned of cloud synchronisation in steam, went into offline mode in steam, deleted “(yourSteamfolderLocation)/userdata/(oneOfTheFoldersIfThereAreMultiple)/(AFolderCreatedAfter19.November2024)” this folder (i think it has a different name for everyone) contains “remote”-folder an a “remotecache” file, so you can find it by that. Then i rebootet my PC, started steam (still in offline mode!) started msfs24, had to re-login into XBOX account, then when it came to the progress bar i had to go online in steam again. From then just normally proceed like it’s the first install.
NOTE: ALL YOUR PROGRESS WILL BE DELETED. BACKUP ALL FILES YOU WILL DELETE BEFORE DOING SO, SO THAT YOU CAN RESTORE THEM IF YOU DELETE SOMETHING WRONG. I’M NOT PROFESSIONAL OR ANYTHING! THIS IS JUST WHAT WORKED FOR ME
If you dont understand the instructions, just ask and i will try my best to help