The Plesk Web Hosting Control Panel allows you to manage your web hosting settings such as changing your FTP password, setting up a databases, password protecting directories etc.
You can access the Web Hosting Control panel within your 1st Domains account:
1) Login to the Account Manager and select 'Manage Domains & Services'
2) Select the domain name you wish to manage from the list
3) Under the 'Domain Name Services' section select the 'Web Hosting Control Panel' link to login to the Control Panel.