Sorry if you couldn’t understand the FAQ, let me explain again:
First try weather Wappalyzer can detect wordpress on http://hide-my-wp.wpwave.com or not.
If Wappalyzer can’t detect WP, you can hide your site, too. To do that choose higher privacy settings scheme and wait for some days in order to renewing Wappalyzer cache.
Note that enabling higher privacy may cause incompatibility with some plugins so check your site carefully and if there was any serious problem disable that related feature in HTMP.
I think enabling ‘Avoid direct access to PHP’ is usually helpful in this case.