Oupss... sorry sorry it's windows XP...
Then I'm sorry, but I'm afraid it's not supported anymore.
We did our best to not abandon FS9 users after the Esellerate closure, and made the effort to update the FS9 Addon Manager to use the new activation system based on Soraco. Unfortunately, due to various dependencies on modern versions of libraries like .NET and other basic OS requirements, there's no way we would be able to make it running under XP too, let alone testing and supporting it.
Are you aware that, coming next January, even Windows 7 will be phased out entirely by Microsoft ? The normal support period for Windows 7 stopped in 2015, and in January 2020, even the extended will cease.
End of life for Microsoft, has obvious repercussions to what we can develop for. Using the latest MS compilers, which are mandatory to support the new simulators and Windows 10, results it's almost impossible to do something that still works on XP, and the same is valid for any interfacing with 3rd party libaries and services, which all requires newer and more secure OS.