Core settings are found in Dashboard -> Helpdesk -> Helpie Settings -> Core.
Knowledge Base Main Title:
Under Core Settings tab, you can set the Main Title of the Knowledgebase. The title is displayed on the main page of the Helpdesk.
Knowledge Base Sub-Title:
You can also change the Knowledge base-subtitle which will be displayed right below the Main title.
To import data from other post types, you can use post-duplicator WordPress plugin.
Articles can also be edited from the front end. Front-end editing option can be enabled from the checkbox Enabled Frontend editing and you can also control who can edit in the Front-end.