Instead of restoring some very very old backups, I've decided to use this as an opportunity to give the base site a fresh coat of paint, rebuilt from the ground up.
No ETA on when that will be finished however, I have a lot on my plate.
If you're looking for the old Twilight Forest Testing Server previous season world downloads...
I'm sorry to inform you that they were all lost. In total they added up to nearly a TB of data, I didn't really have a place to store backups of those.