CM Download (CMDM) - Extras - Support Forum
The CM Download Manager plugin comes with a support forum module that can be added to the download page. You can also integrate it with the CM Answers plugin and instead of the built in support forum use the CM Answer forum which is much more advanced. To read more about the integration with the CM Answers forum click here.
Using the Built-in Support Forum
The built-in support forum appears as a tab inside the download page:
You can make the forum mandatory to all downloads by visiting the Support forum section under the Download Page tab in the plugin settings:
You can choosing to enable it for all downloads, another option is to let the user decide if the support forum should be active.
Support Forum Notifications
The support forum sends notifications for new messages to the user who posted the downloads, and also let users who posted a message to follow any answers posted.
You can read more about the notifications settings on this page.