3.1.4 Compatibility

I’m doing some work for a site still running 3.1.4. Is this plugin simply outright incompatible, or has it just not been certified for 3.1.4.

If it’s the latter, can I execute the battery of tests and either eliminate or tweak the ones that fail?

Thanks,
James

http://ww.wp.xz.cn/extend/plugins/login-security-solution/