In order to change the vBulletin forum administrator password you should load your vBulletin admin control panel and complete the steps listed below:
1. Open the Users -> Search for Users section.
2. Select Administrators from the Primary Usergroup drop-down menu.
3. Click on Find.
4. Click on every administrator's username and set the new password in the Password field.
At the end log out and log in with the new password for your administrative account.
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