BuddyDev Dashboard plugin enables automatic upgrade for all of BuddyDev plugins & thyemes. We recommend you to install it and keep it always activated on your site if you are using BuddyDev plugins or themes.
You can get the API key and access details from your BuddyDev accounts settings.
This plugin is compatible with WordPress Multisite as well as standard WordPress. The Automatic updates are available for all of our free & premium plugins and themes. API keys are available for each registered member( free & premium both ) of BuddyDev.
Please see the details for configuration here.