[Koha] password problems

WE have installed Koha 3.0.0 on Debina etch, but had a failed apache file. When a friend helped us fix this file, we have lost the password due to too many failed attempts at loggin in. (Some friend!!!) We are unable to login as "kohadbuser". Could you send us some help so that we can access this account, please? Thanks heaps, Carmel Young Catholic University Malawi