Hi,
I have now experienced exactly the issue described here.
I am reinstalling onto P3DV4.5 and have already installed GSX and GSX Level 2.
I then successfully installed Zurich and Hawaiian Part 1 & 2 sceneries.
When I try to install Los Angeles it states: "This scenery requires GSX Level 2 expansion to create Jetways & Safegates, please download and install the latest GSX full installer, before trying to install this scenery"
This scenery was working correctly before.
Mervyn Edwards