I’m a pro user and my website was infected while this plugin was installed, so it was not really helpful to prevent the infection.
Luckily I also use other malware scanners and I was warned about the following issue:
WordPress Solid Security Plugin <= 9.0.0 is vulnerable to Sensitive Data Exposure
btw since a week I’m also not able to use my pro license because the solid WP setting page is not appearing, and the support is not very helpful.
Given this actually I’m not very satisfied with the plugin, I’m considering switching to other solutions.