In addition, you have to manage Category filter plugin settings in NOP admin
(path: /Admin/CategoryFilter/Configure).
Plugin enables multi-store configuration - you can configure different settings for different stores if needed.
Cache Duration - cache duration in minutes.
Specification Attributes Names - Add here all localized specification attribute names used for category filter. Add names' list with comma separated.
If field is empty, then category filter is hidden.
Place Category Filter At Bottom - you can specify, if category filter is displayed at the top or at the bottom of specification attributes block.
NB! This setting changes only category filter position inside specification attributes block. This setting does not affect other filter types (product attributes, manufacturer etc.).
Hide If Only One Category In Filter List - this setting enables hiding category filter when only one category is left in the options.
Hide Other Specification Attributes Ajax Filters - this setting enables hiding other specification attributes. When it is true, then only category filter is displayed and other specification attribute filters are hidden.
Sort Filters Options - this setting enables to sort filters options automatically (alphabetically and by numeric values).
Copy SpecificationFilter View On Startup - If valued, then SpecificationFilter.cshtml file from this plugin will be copied to Ajax Filters plugin folder to overwrite original file (Recommended).