Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
But with the advent of the new MSFS the sales have now dropped to almost nothing, and the cost of the web sites has not gone down. So it just does not make sense to continue. Most of my work these days is responding to former customers who managed to lose their downloads and request new links and registration keys.

Sorry to hear FS Addons are closing down I have a number of their models.
If its not too late does the Bristol Frieghter work in Prepar3d V5?