Menu Alignment

Left Alignment

.sp-megamenu-parent {
	list-style: none;
	padding: 0;
	margin: 0;
	z-index: 9;
	display: block;
	float: left;
}

Center Alignment

.sp-megamenu-parent {
	list-style: none;
	padding: 0;
	margin: 0;
	z-index: 9;
	display: block;
	float:inherit;
	text-align:center;
}

Disable menu dropdown arrow mark icon

body.ltr .sp-megamenu-parent > li.sp-has-child > a::after, body.ltr .sp-megamenu-parent > li.sp-has-child > span::after {
    content: "";
}