Yesterday, Microsoft released the newest version of the Microsoft Dynamics CRM SDK and it contains a much needed feature called a solution down-leveling tool.
This allows you to take exported Polaris release solutions and import them into UR 6+ environments. The problem is that the new entities that contain the new forms have new system entities attached to them that older systems don't have. This tool will strip out those dependencies so you can import the solution successfully into older systems.
Get it at the link below: