<p>Previously you had to use <b>Settings → Image verification</b> to configure anti-bot protection. Starting with [product] 4.5.1, that section of the settings doesn't exist. All relevant settings were moved to the Google reCAPTCHA add-on. The values of those settings remain as they were before the upgrade.</p><p>The Google reCAPTCHA add-on is now the only mechanism of anti-bot protection available in [product] by default. To set up anti-bot validation, follow these steps:</p><ol><li>Go to <b>Add-ons → Manage add-ons</b>.</li><li>Find and click on <b>Google reCAPTCHA</b> in the list of add-ons.</li><li>A pop-up window will open. Enter <b>Site key</b> and <b>Secret token</b>, then save your changes. The instructions on how to get the key and token are available <a href='https://developers.google.com/recaptcha/docs/start' target='_blank'>here</a>.</li><li>Configure other settings of the add-on as you see fit.</li></ol>