Tooltip not working in version 3.0

Hello, I am currently running version 3.0 of WP ULike on my website, and for some reason the Tooltip functionality is no longer working? When running version 2.7, if a user was logged out and hovered over the thumbs-up they would get a small pop-up tooltip that said “Please login to like comments or posts”, but now that I’ve upgraded to 3.0, that message no longer appears. Looking at the wp-ulike.min.css file, it looks like all of the classes for the tooltip have been removed. Is there a new way to achieve this functionality that I’m just not seeing?

Thank you in advance for your help!