Just wanted to throw this out there in case anyone is not aware.
Make a backup of the default DB if you are making changes into it before loading a new build, etc...the new build overwrites what is in your folder.
(FYI - it doesn't affect anything in the saves folder)
I updated my default DB to reflect numerous more high schools so the recruits pull from that...was my only reason to alter the default - but had I not backed up I would have lost all my work.