open a terminal window or a dos prompt (windows = start -> Run -> cmd)
change to your $SPECROOT/mysql/bin directory
do a mysql -uroot -proot to connect to the mysql database system
do a use reporting; don't forget the ; at the end!
do a select aes_decrypt(BOPassword, 'spectrum') from registry; again don't forget the ; at the end!
If your field says NULL you do not have set a password therefor leave it blank.