Hi @Pt6a27!
As your post is about issues with 3rd party content, I’ve moved your topic to the #third-party-addon-discussion:airports category which is more appropriate
Thanks!
Did you run the FSDT Updater since updating to SU5 (they did release rather large updates for most/all of their airports to update for SU5)? Assuming you bought from them that is. If you bought in Marketplace it may take a few days/a week for the update to hit.