• Download the plugin from the right sside download Link
• Unzip recent-visitor-for-bp.zip
• Upload recent-visitor-for-bp folder to wp-content/plugins
• Go to Wp Admin->Plugins->Installed and activate "Bp Recent Profile Visitors"
• Let the plugin do its magic.
• Alternatively, you can use wp-admin->Plugins->Add New, click on the upload tab and browse this zip file, upload and click activate, you are done.