How to disable pop-up windows in calendar grid view?

Thank you for your wonderful plugin!

In calendar grid view, I’d like to make disable pop-up windows and only to show text titles(no links).

I read below information and tried.

http://wordpress.org/support/topic/plugin-my-calendar-pop-ups-in-calendar-view

I added

#jd-calendar .details {
display: none;
}

to an end of existing code in “My Calendar” > “CSS Edit”, but my settings didn’t reflected.

https://wordpress.org/plugins/my-calendar/