CSS not working after 2.2.4 update

Hello!
I’m enjoying your plugin very much, and just left positive review.

I just updated to the latest version of the Recent Post Slider plugin (2.2.4).

The CSS additions I had previously made are no longer working (perhaps because it’s now referencing the wrong attribute). Below is an example of the code I’m using. How would you recommend that I change this to apply to the new version of the plugin?

.recent-post-slider h2.wp-post-title a{font-weight: bold}

.recent-post-slider h2.wp-post-title a{font-size: 30px}

I also have the same question about the correct CSS to use for your other plugin, Post Grid and Filter.

Thanks for your time!