Here's the reason why there is no restore option within UBB. We couldn't restore the entire table at once due to timeout issues, so we'd need to restore it in chunks. Which means we'd have to drop a table before starting to restore it, or just drop the data from the table.
We can't drop the table because UBB might rely on the table and would no longe work, right in the middle of your restore. If we dropped data, when we got to the USER_ tables we could have the same issue, because as an admin you'd either get logged out when your data was dropped, or you temporarily wouldn't exist at all.
