Computer Was Off All Night, Woke Up And Now Locked Out

Hello, is this plugin compatible with 3.5.2? I updated my blog last night, turned off my computer, woke up this morning and tried to go to to my login page but was greeted by the error which said there was too many failed login attempts from ip which was strange. Is this a plugin issue or suggestive of something else?

https://www.ads-software.com/extend/plugins/simple-login-lockdown/