The following documentation explains the configuration options of the VP Prime VirtueMart Category module for VirtueMart.
Configuration
Module

Module
Parent Category
Select the parent category. If top level category, all categories will be merged.
End Level
Level to stop rendering the menu at. If you choose 'All', all sub-categories will be shown.
Advanced

Menu Tag ID
An ID attribute to assign to the root ul tag of the menu (optional).
Menu Class
A suffix to be applied to the CSS class of the menu items.
Layout
Select the layout as "Dropdown" for dropdown style menu. Select the layout as "Default" for normal collapsible menu.
Module Class
A suffix applied to the CSS class of the module. This allows you to create customized CSS styles that will apply just to this module.
Caching
Whether or not to cache the content of this module. "Use Global" will use the settings from Global Configuration.
Cache Time
The number of minutes for which to cache the module locally. It can safely be left at the default.
Module Tag
The HTML tag for the module to be placed in. By default this is a div
tag but other HTML5 elements can also be used.
Bootstrap Size
This allows you to choose the width of the module via the grid size element built into Bootstrap.
Header Tag
The HTML tag to use for the modules header or title.
Header Class
Add optional CSS classes to the modules header or title element.
Module Style
Override the templates style for its position.