[Support request] Styling of Read More button

When I went Pro my styling for the Read More went away. Here’s the CSS I’m using with Simple CSS:

.wp-show-posts-inner .wpsp-read-more {
margin: 0 auto;
}

.wp-show-posts-inner {
display: flex;
flex-direction: column;
}

a.wp-show-posts-read-more,
a.wp-show-posts-read-more:visited {
display: inline-block;
padding: 8px 15px;
border: 2px solid #f39200;
color: #222;
font-size: 1.0em;
text-decoration: none;
}

.wpsp-read-more {
margin: 0 0 1em;
display: inline-block;
}

a.wp-show-posts-read-more:hover,
a.wp-show-posts-read-more:focus {
border: 2px solid transparent;
color: #fff;
background: #f39200;
text-decoration: none;
}