Hello,
The MSFS2024 extensions has been removed from the Khronos exporter panel by design. Everyone should use the multi-exporter panel to get gltf exported for the sim. As for the plugin version 2.3.1, you don’t need to test it because all the fixes are in 2.3.2 which is the next plugin version coming with the next Core MSFS2024 SDK.
This next version will support Blender 4.2.xx LTS and will still support Blender 3.3.xx LTS and Blender 3.6.xx LTS.
Thank you for your report,
Yasmine