Hi,
Try to add the following code snippet to the Custom CSS area in Theme Settings to do this
div.right-column .header-links li {
font-size: 0;
line-height: 0;
text-align: center;
}
div.right-column .header-links li a {
display: inline-block;
height: 30px;
width: 30px;
position: relative;
top: 4px;
font-size:0;
font-style: normal;
}
div.right-column .header-links li a:before {
content: "\e005";
display:inline-block;
font-size:20px;
line-height: 30px;
height: 30px;
width: 30px;
font-family: Simple-Line-Icons;
}
.logged-in .right-column .header-links li:last-child {
display:none;
}
div.right-column .header-links li a:after,
div.right-column .header-links li:after {
content:none;
}