I found description about password reset, somewhere on this site, but I can't remember where...
Here is a copy I have, just in case...

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Admin Account Password Reset
Occasionally Web Wiz Forums owners forget login details to their Admin Account and therefore can not login to administrator Web Wiz Forums.
The problem is that passwords are 106bit one way encrypted for security reasons so hackers can not get hold of your password. This means passwords can not be recovered, however, before you completely panic there are some options available to you to reset your admin passwords.
The simplest way, if you have set an email address for the Admin Account and have the email features of Web Wiz Forums correctly setup and enabled, is to use the Forgotten Password page from the login page to request a new password be sent to the email address entered for the admin account.
If you are unable to request a new password by email then the last option is to manually reset the password in the database following the steps below:-
Open the database in a database management tool
Open the database table 'tblAuthor'
Find record with the 'Author_ID' with the value of '1', this is your Admin Account record
Copy and paste the following to the 'Username' field:-
administrator
Copy and paste the following to the 'Password' field:-
A85B3E67CFA695D711570FB9822C0CF82871903B
Copy and paste the following to the 'Salt' field:-
72964E7
Your Web Wiz Forums Admin Account username and password should now be reset to:-
Username: administrator
Password: letmein