Hello,
XStore 5.0 is major update and we have changed a lot of things https://xstore.8theme.com/update-history/ including theme styles.
Please add this code in Theme Options > Custom css or in style.css file of your child theme:
.widget_product_categories .widget-title {
text-align: center;
padding-top: 20px;
padding-bottom: 20px;
}
.widget_product_categories.sidebar-widget ul li:last-child {
border: none;
}
.widget-title {
line-height: 1.1;
}
Regards