If you're worried about your clients grabbing your Oxygen Builder license, you can use this quick code snippet to obfuscate the license page:

<?php
add_action('admin_head', 'hide_license_for_client_ISO');
function hide_license_for_client_ISO() {
  echo '<style>
.oxygen_page_oxygen_vsb_settings .nav-tab:nth-child(6) {
    display: none!important;
}
  .oxygen_license-wrap, .oxygen-license-wrap {
    display: none;
}
  </style>';
} Code language: HTML, XML (xml)

They can still find it, but it's a bit harder to do so, and you protect your license from unauthorized use.