Well, I'll be...... That seems to have done it although I don't recall checking that box....but I guess I must have. Thanks for the help. If it's only been erasing session by session history since the box was checked, I wonder if all the previous history is available and loadable.
How badly do you want the history? Files like that are not backed up by Time Machine, but if they haven't been overwritten, they may still be on the drive although deleted from the directory structure. If you want the history badly enough a file recovery utility such as Tech Tool Pro might be able to recover it. In the meantime, quit using your computer or you risk overwriting the files.
