Do you mean the standard Windows right click menu when you click on the start button, or the Windows 10 style start menu?
For the former you can do that as follows :
In Start10 configuration go to the desktop page. From there click advanced and then pick the Show Win+X menu when right clicking the start button at the bottom of the screen option.
If you want the Windows 10 style start menu when you right click then that's not a feature we offer currently. We can investigate that to see if that is possible.