QTR-Quadtone RIP

Hi,

I have recently upgraded QTR and to version 2.5.1.2 of QTRGui and I am 
impressed with all the improvements. But one thing doesn't work on my 
system (Win XP SP2; Epson 2200): The four "system icons" in the upper 
right corner of the interface don't do anything. I cannot close the 
program, minimize, or rollup, etc., from these buttons. When I click on 
any one of the four, nothing happens. The only way I can close the 
program is from the File menu. Fortunately, everything else works just 
fine, so this is at best an inconvenience. Curiously, if I load some of 
the different skins (I regularly use the default), the buttons respond 
(i.e., change color) when the mouse cursor passes over them, but still 
don't do anything when I click.

Is there a way I can get these to work?