If all sim icons are greyed out, it means your FSX is not the correct version. Our products requires FSX with the Service Pack 2 or the Acceleration Pack installed, or FSX Steam Edition.
If your FSX is the original version or the Service Pack 1 version, our products cannot be installed.
The Service Packs 1 and 2 are a free download from Microsoft and are required by most of the 3rd party add ons.