Hi Polina,
Thanks for coming back to me. So in the viewer, in the top right hand corner, there is my username (that I am logged into my server as), and then to the left of that there is a padlock with the word "lock" next to it. If I click that, it locks the viewer software, and I cannot see the hosts without putting a password in. This is the password that I'd like to change please.
Hopefully this is enough info, but please see attached screenshot.
Thanks,
Ajoy.