The information is all stored in a database, essentially a bunch of files on disk. This forum is an old version of this:
https://www.phpbb.com. If the database could be obtained then it should be possible to set this up somewhere else and keep the information. This version seems to be quite old so I have posted a question to the phpBB forum to see what's possible.
We should do something fairly soon because Web hosting costs money and either Michael Stoic is paying it or no one is. In either case we are vulnerable to having it shut down and lost.
I'll report back about the database transfer.