Blocks some not others

Downloaded this plugin as my referral report in analytics was completely distorted by referral spam, after downloading the plugin and following the two step process on the plugin page I saw that a lot of the spam traffic was disappearing from my report, which was great however the one site I wanted to get rid of most (the reason I downloaded the plugin in the first place) is still appearing on my reports ‘Rank-checker.online’ I turned to the support page for help however the response is so far non existent, I would just love some help on this really as the software can clearly do the job on the other referee’s.