To import path from physical robot (upload) you can use options available in Robotics -> Robot Program -> Robotic Program Inventory (Upload Program). But as far as I know you need controller which is not included to RobotExpert demo. If you have path from Robcad you can probably import by using "Upload Robcad Robotics Program".
Please clarify your question. Where do you want to import your path from? other simulation tool? CAD application?
Generally speaking, RobotExpert provides good tools to generate robot path based on product geometry and 3D curves that you can import or create.