Use standard WordPress Plugins page. In emergency case, rename plugin folder under /wp-content/plugins/ over FTP access or use emergency reCAPTCHA deactivate link.
For example, you can use this in your global functions.php file:
function customSgrRenderList(array $list): array //Where reCAPTCHA is rendered
{
//unset($list[0]);
$list[] = 'register_form';
return $list;
}
add_action('sgr_render_list', 'customSgrRenderList');
function customSgrVerifyList(array $list): array //Where reCAPTCHA is verified
{
//unset($list[0]);
$list[] = 'lostpassword_post';
return $list;
}
add_action('sgr_verify_list', 'customSgrVerifyList');
Variable $list is array of default hooks, indexed by numbers.