Compatible with WP 4.2.4?

I’m a new WordPress user.

I note that this plugin is not declared to be compatible with WP 4.2

Is is still OK to install it with 4.2.4?

If users are already using it with 4.2.4 – at what point does it become declared as ‘comparable’

thx

https://ww.wp.xz.cn/plugins/simple-custom-css/