To identify the version of software that you are running, click the Down Arrow to the right of the Help icon. This icon is at the far right end of the program title bar. Then, click About:
Autodesk Simulation Mechanical 2018 is identified as follows:
Build 2018.00.00.nnnn dd-Month-2017
(where nnnn, dd, and Month are set during the final build of the software)
Otherwise, export models from your CAD application to a universal format (such as STEP or IGES), which Simulation Mechanical can open directly.
(Application Menu)
Export
Autodesk Nastran Editor.