This is also the best way to change a users forgotten password. But first you need to add a new master user and after that to change the lost password.
1.By using terminal:
sudo vh_regnick -f -n new_username -p new_password -c 10
new_username - your new username
new_password - the password for the new user
-c 10 - the class for your new user. 10 is admin master
2.By using commands in DC client (DC++, Strong DC++):
!regnewuser your_username 10
your_username - your new username
10 - your new usernames class
aftre that, change its password:
!regpass your_username new_password
new_password - the password for the user you just registered
To delete an registered user:
!regdelete username_to_delete
Resources: Verlihub Project
alternative link download