I, too, have tried scanning without learning anything. On live site (where PHP is 5.6, WP is 4.9.4, and plugin is 1.4.5), it ran for a long time (10-15 min., with a gradually incrementing count (n of nn), but at the end showed no result. I then tried it on a local environment (Flywheel, latest version; PHP 5.6, WP 4.9.4, plugin 1.4.5), where it spins for about 1-2 seconds then . . . nothing. I’ve tried repeated, with all versions of PHP selected. Still nothing.
