In this article you can get a fast run-through on the menu settings, and you will able to create an instance to your frontend.
Download the zip installation package file from your download area, then go to Extensions / Extension Manager. Browse the downloaded file, then click to the Upload & Install button.
By installing the module an instance will automatically created in the Module manager, so you can edit that one, or create a new one by click on the New button on the top left, and select the Vertical Menu as type.
First of all, type a name to the module. Then on the right, select a position for the menu item, where you would like to show it on your frontend. You should always set a valid position for the menu module, even though you would like to use it as a sidebar. Set the status to Published and under the Menu assigned tab on the top, select the pages where you would like to display the menu. It is also recommended to change the Module Style parameter under the Advanced tab on the top to none value.
Now let's turn back to the menu-specific options. Under this section you can set some basic parameters, which will have effect for the operation of the menu.
With the Content type option you can select which content type would you like to use. You can select from 8 types. Please note, that maybe not all of the types will be in your list, because only the installed components will appear.
With the Navigation type you can set how your menu will behave. There are 5 different types. All of them are described in details in the other part of the documentation.
The next Menu positioning option related to where to position the menu module. Here you can select from 4 different positions. All of them are described in details in the other part of the documentation.
In this section you can make settings for the selected menutype. You can select which categories will be shown with a multiselect, or switch whether the items/products will also appear in the menu.
Vertical Menu has 2 different themes (Flat and Clean), and each one has predefined color schemes. You can select a scheme, then you are able to edit each color by smart color pickers. You are also able to change the Font settings, and you can set-up different design for each levels.
Now you just have to save the module, and check it on your frontend.