ClickDimensions is provided as a managed solution for Microsoft Dynamics CRM 2011, 2013, 2015, 2016 and Dynamics 365. This means that CRM is responsible for the processes of installing and uninstalling the solution and its components. Uninstalling a managed solution will delete all the data stored in the solution's custom entities. To uninstall or remove a managed solution, see the following article from Microsoft:
Delete a solution:
CRM 2016/Dynamics 365: https://msdn.microsoft.com/en-us/library/gg327822.aspx
NOTE: When deleting a solution, you may find that the solution has dependent components (dependencies) that prevent it from being removed. Dependencies can be created when customizing CRM after a solution is installed. In order to remove the solution, you must first remove the solution's dependencies. See the above article to links about dependencies and steps for removing components.