I have had flight sim premium deluxe disc version successfully working since I purchased it in 2020 on a PC . I have NOT purchased airport addons. About 6 weeks ago after a standard FS update which ''stuttered on download" two major problems occurred, 1.I had some aircraft where you could not see out the cockpit due to a chequered effect, basically cockpit screen replaced by solid chequered colours AND some aircraft had some external chequering. This I cured by removing, as directed in various FS blogs, all folders starting with fs-base-??? in the packages folder, in my case in “C:\XboxGames\Microsoft Flight Simulator\Content\Packages” yes I use a PC NOT xbox! When I restarted FS it automatically repaired the folders, but the I lost all my ground staff and vehicles (some not all air bridges work). Will this rather complicated solution work for me to cure it? Surely after so long MS must have rectified it by know. Clearly the issue was caused by an MS FS update that lost some of the files from the PC. Reluctant to do this cure as I suspect it will leave some bugs, so a complete reinstall may be the answer. Tried it once since and it doesn’t ask for any discs to be reinstalled and took only 20 minutes…I’m baffled and frustrated! I feel over £120 wasted!