I haven’t checked yet, but a quick way to find out if any planes have changed at all is to go into your lOfficial” folder where the majority of the content is stored, and sort by date.
If none of the planes you have observed this change have been altered on the 8th, then they weren’t changed. If they have, you can drill down to find out which files in particular have changed. You’ll most likely be looking for flight_model.cfg changes.