In version 1.1.7 we’ve added a new option to display Knowledge base posts according to their recent modification date.
Go to knowledge base manager shortcode editor panel and you will see “Recent Modified” option in “Order Settings” section.
Check following image-
Example Shortcode:
[bkb_category categories="copyright,introduction" orderby="modified" order="ASC" bkb_list_type="rounded" cols="2" /]
Hope that will help you. Thanks !