Please kindly advise how to change the database password on the localhost.
What I did, was to backup the mysql file using export, and with a slightly different name.
Create blank filename of newly named with a new password, then import data to it. Change program configs, dbase name/passwd in your config files, test everything, then delete the old mysql file.
The above way is much more safe. You could also just export using same name, then delete it from server. Then create filename with new password and then import.
You might also try using the contact form. I think the admin will be able to change it for you.