Please see the following steps on how to reset your Plesk control panel password.
• Log in to your LetsHost Client Area and click on Services > My Services
• You will see your products/services listed out here. Click on Active beside your hosting package
• On the left, click on the link Change Password
• Enter your new password twice (make sure its strong/unique) and click save changes. Your password has now been changed
If you require further information/assistance on this, please submit a ticket and a member of the team will be happy to assist further.