As you have certainly felt FreeFEM is not user-friendly, so if you want to change certain options of this utility, you will haver to change the code and recompile it.
However in XGfem this tool is competely integrated via a dialog box. All you have to do is to click on the menu Execute , then choose the Adaptation mesh setup . A dialog box will be popped up. The options are selected by default like in FreeFEM.