Okkar Kyaw

Sorry my question was incomplete. I found on some youtube videos that we can use LS DYNA from workbench by adding as an extension. The feature for workbench is more convinent than LS pre/post for me . I bought a liscense for LS Dyna and they provided me with LS Pre Post and the solver(LS-Run). 
If I have a liscense, can I use LS DYNA with workbench. Do I need to buy a separate liscense for workbench. Thank you so much.