plot2d from Xmaxima in v. 5.30?

I get a normal line plot with windows binary 5.28.0

using plot2d inside xmaxima:
-------------------------------
(%i1) myxy : [[- 0.132, 0], [0.0, 2.344], [0.1, 2.25], [0.2, 3.05], [0.3, 
3.725],
                    [0.4, 4.3], [0.5, 4.8], [0.6, 5.2], [0.7, 5.6], [0.8, 
5.8]];

(%o1) [[-0.132,0],[0.0,2.344],[0.1,2.25],[0.2,3.05],[0.3,3.725],[0.4,4.3],
       [0.5,4.8],[0.6,5.2],[0.7,5.6],[0.8,5.8]]

(%i2) plot2d([discrete,myxy]);
(%o2) ""

----------------
but with the windows binary v. 5.30, using plot2d from xmaxima,
(with exactly the same syntax) no plot is drawn, and up
 comes the gnuplot interface with menus and a general prompt.

(%i3) (display2d:true,build_info());
(%o3)
Maxima version: "5.30.0"
Maxima build date: "2013-06-01 21:29:43"
Host type: "i686-pc-mingw32"
Lisp implementation type: "GNU Common Lisp (GCL)"
Lisp implementation version: "GCL 2.6.8"

Ted Woollett