It doesn't work. Sorry.

Long story short, I had a laptop crash a while ago and lost the ability to manage and develop the site. So it is stuck in the state it was in at that time until I find the energy and motivation to rebuild it in a modern framework. And that's not too likely. I can keep adding the BTS data to it and I'm mostly up to date on that front, but the First Class membership is disabled because the international route data content never got broad enough to justify the membership costs so I removed it as an option. But I can't update the site to say that.

I have been collecting more international data recently and might try to add it in eventually, but it would only be from ~August 2019 forward, nothing older.