When Florence was released, we found a bug in the old version of the Addon Manager used by Cloud9, and that was fixed by updating the Cloud9 Addon Manager stand-alone installer. It was announced on both Cloud9 and Aerosoft forums.
Installing the Cloud9 updated version, will make Orlando, Bergen, Florence and Zurich all compatibile.
If you want to save time, instead, just replace bglmanx.dat in the FSX root folder with this file:
[attachment deleted by admin]