This is a method to fix some add-on aircraft and liveries. It cannot address all aircraft issues.
If you have added MSFS2020 add-on aircraft or livery data to MSFS2024 Community and it stops at 97%, try starting it in safe mode.
If it starts, the problem is with the add-on aircraft or add-on livery.
This may be fixed by modifying layout.json.
(There was no problem with MSFS2020, but in MSFS2024 v1.2.7.0 , the inconsistency in the file size described in the .json causes a problem.)
Drag and drop the layout.json included in the problematic data into the generator.exe below and overwrite it with the correct values.
If this does not resolve the issue, it is not possible for users to fix it.
(This may also be able to fix the situation when MSFS2024 starts but the aircraft model and textures cannot be displayed.)