In the "Software" section, click on "Softaculous App Installer" Icon.

• Choose Protocol: You can leave this as it is.
  
• Choose Domain: If you don't have multiple domains, leave this as it is.
• In Directory: If you want to install this in a directory, for example example.com/forum, enter the directory name. Otherwise, leave this blank to install in your main domain example.com

7. Enter the following details under the "Site Settings" field:

• Site Name: Name of your Forum like "Your Domain Name - Gaming Forum"

• Admin Username: Your new Vanilla username (for security reason do not use the "Administrator" or the "Admin" username.)
• Admin Password: Use a strong password.
• Admin Email: Your e-mail address. (Useful for administrator account password reset, notification, etc)