It depends, when a person tries to log into your site and he/she does not knows the correct credentials the information is collected by the plugin in two different places: a remote Sucuri server, and a local plain text file. The plugin allows to reset the content of the local file but not the information stored in the Sucuri servers because someone may try to hide his/her fingerprints during an attack deleting this information.
So, to reset the content of the failed login attempts shown in the “Last Logins” page you can use a button available in the “Scanner Settings” panel located in the plugin’ settings page. But if you want to reset the logs shown in the “Audit Logs” page then that is not possible for security reasons.
