There's a website when I open the LiveZilla URI using my browser. Can I delete it?
The website you see when you enter the URI of your LiveZilla Server installation in your webbrowser is called LiveZilla Server Page. If you don't want this page you can replace the index.php file within your LiveZilla Server folder on your webserver with an empty or redirecting index file (index.htm, index.html, index.php ...).
For security reasons please make sure that there is always an index file available. Unauthorized persons may be able to browser your file structure elsewise.