LS-DYNA module in Workbench vs. the LS-DYNA Program Manager

I am a beginner of LS-DYNA. I see some people use LS-DYNA Program Manager to solve the Keyword file. Can we import the .k file into Workbench LS-DYNA and use it as a solver? What is the difference between the LS-DYNA module in Workbench and the LS-DYNA Program Manager? I have used LS-PrePost to make a .k file, can I solve the problem with the LS-DYNA module in Workbench? Sorry if this is a silly question.