No, the problem is that the servers used before for product activation are no longer available and the installer can't get a response to install the addon.

As for the fact that they can't do anything, maybe they can remove their products for FS9 from their store and other stores, I bought the C130 for FS9 a few days ago without knowing this and I can't install it.

It's not a support thing, it's that they activate the servers to be able to activate the installers, it's a problem that apparently they know about and even so they continue to sell the products for FS9.