I am having the issue in the subject again with KIAH.
I ran the installer just downloaded from the website. It seemed to run with no issues. I only selected P3D V4. I ran the FSDT Live update next.
I have the addon.xml in the documents folder, I have the KIAH folder in the FSdreamteam folder, and in the simobjects I have the FSDT KIAH folder.
What can I do to have the scenery activated?
I am going to run the updater again and try to manually add the KIAH folder to the scenery library.
EDIT: I ran the updater again, re-ran the installer again. Nothing changed. Manually adding the scenery only added the ground photoscenery, no buildings were visible.
I had the same issue with Memphis. Somehow I solved it but don't remember how.