Then your support is useless because this is nopCommerce's default topmenu and you cannot get it working... Hm.
The default nopCommerce menu works fine with the default theme (demo here). The category menu works fine with the wedding theme (demo here).
So you need some customization support for the purchased theme. This is not the default functionality. And as I've written further customization support is not included and it requires developer skills. If you don't have developer skills, then you'll have to find a person who can help you customize the theme.
P.S. Although such support is not included here are the changes for the top menu (below):
1. Open \Nop.Web\Themes\Wedding\Views\Common\CategoryTopMenu.cshtml file
2. Replace
@if (Model.Categories.Count > 0)
{
<ul class="top-menu top-menu-main">
@foreach (var category in Model.Categories)
{
@RenderCategoryLine(category, 0, "")
}
<li class="search-box">
@Html.Action("SearchBox", "Catalog")
</li>
</ul>
}
with
<ul class="top-menu top-menu-main">
<li><a href="@Url.RouteUrl("HomePage")">@T("HomePage")</a></li>
<li><a href="@Url.RouteUrl("RecentlyAddedProducts")">@T("Products.NewProducts")</a></li>
<li><a href="@Url.RouteUrl("ProductSearch")">@T("Search")</a> </li>
<li><a href="@Url.RouteUrl("CustomerInfo")">@T("Account.MyAccount")</a></li>
<li><a href="@Url.RouteUrl("Blog")">@T("Blog")</a></li>
<li><a href="@Url.RouteUrl("Boards")">@T("Forum.Forums")</a></li>
<li><a href="@Url.RouteUrl("ContactUs")">@T("ContactUs")</a></li>
<li class="search-box">
@Html.Action("SearchBox", "Catalog")
</li>
</ul>