The Program Options dialog window has five tabs, one related to Graphics, one to Program Options, one to Navigator, one to FE-Mesh (below), and one to Files and Directories.
In the Mesh Limits part of the FE-Mesh Tab one can
In the Export Options part of the FE-Mesh Tab one can select various export options, such as
Finally, in the Preferred Generator for 2D Meshes part of the FE-Mesh Tab, one can select whether to use the MESHGEN (default) or Genex program.