Dokan enable single seller mode

Hey there,
First of all a very much thanks for this wonderful plugin created for multi-vendors by weDevs. However, I need to keep Dokan and enable the single seller mode as shown in the documentation of the plugin: https://wedevs.com/docs/dokan/settings/dokan-single-seller-mode/. But I cannot seem to find that option on the settings page. I am using Dokan Free version 3.0.4. Please guide me in this regard.

Thanks in advance!