This bug is still in 1.5.3.0 Has anyone reported it to the bug hub?
My Cessna update today is blocked by the sound file (.pck) opened already by FS24. Hence the folder cannot be deleted by Windows 11 (the hack to make install work).
This is a showstopper development bug for sure, to do with handshaking resources. The Sim code MUST unload ALL plane resources during My Library plane updates; sound files at least.
The install icon has been circling for over 15 minutes. Immediately after killing the sim process, the sound file and folder can be deleted.
The only safe workaround I can find is: Ignore Update, uninstall the object(s), then install them.