Audio compositor

The AC website and mailbox seems to have evaporated, and I am
wondering if anyone knows how I (a registered user) can get AC 4.5 set
up on my new computer.

A comedy of errors led to this. I had email recently about registry
data for something, which I think might have been AC, but in getting
rid of a virus I accidentally nuked my saved email. Meanwhile I had
old email about this, but seem to have saved the wrong file. Registry
data may be in the Windows directory on my old disk; if anyone knows
where that would be exactly, and if it can be copied from an old W98
install to a W2K, that would help.

Of course if anyone knows what the heck happened with AC it would be
nice. I'm not too concerned because AC has been lagging anyway, and
Timidity now seems to be better, but I'd like to know. Any other AC
users out there?