Exactly. Doesn't work without extreme danger of really creating a disaster of your .threads board, which is why we removed it.
phpmyadmin and other backup programs can restore your threads database because they are not actually using the database while restoring it. Restoring the threads database from within threads means you are currently using the database that you are trying to restore. We could, perhaps, write a standalone to do it, but then we're moving away from the aim of UBB.threads and our area of expertise, and moving towards an area where other people are concentrated and do a much better job.